diff --git a/CMakeLists.txt b/CMakeLists.txt
index fdc61c06..b178462e 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -69,6 +69,9 @@ set(MultiMC_CHANLIST_URL "" CACHE STRING "URL for the channel list.")
 # Notification URL
 set(MultiMC_NOTIFICATION_URL "" CACHE STRING "URL for checking for notifications.")
 
+# The metadata server
+set(MultiMC_META_URL "https://meta.multimc.org/v1/" CACHE STRING "URL to fetch MultiMC's meta files from.")
+
 # paste.ee API key
 set(MultiMC_PASTE_EE_API_KEY "utLvciUouSURFzfjPxLBf5W4ISsUX4pwBDF7N1AfZ" CACHE STRING "API key you can get from paste.ee when you register an account")
 
@@ -264,6 +267,7 @@ add_subdirectory(libraries/classparser) # google analytics library
 
 ############################### Built Artifacts ###############################
 
+add_subdirectory(buildconfig)
 add_subdirectory(api/logic)
 add_subdirectory(api/gui)
 
diff --git a/api/gui/SkinUtils.cpp b/api/gui/SkinUtils.cpp
index 9b6f63a4..e9618bd5 100644
--- a/api/gui/SkinUtils.cpp
+++ b/api/gui/SkinUtils.cpp
@@ -18,6 +18,7 @@
 #include "Env.h"
 
 #include <QFile>
+#include <QPainter>
 #include <QJsonDocument>
 #include <QJsonObject>
 #include <QJsonArray>
@@ -35,10 +36,14 @@ QPixmap getFaceFromCache(QString username, int height, int width)
 
     if (fskin.exists())
     {
-        QPixmap skin(fskin.fileName());
-        if(!skin.isNull())
+        QPixmap skinTexture(fskin.fileName());
+        if(!skinTexture.isNull())
         {
-            return skin.copy(8, 8, 8, 8).scaled(height, width, Qt::KeepAspectRatio);
+            QPixmap skin = QPixmap(8, 8);
+            QPainter painter(&skin);
+            painter.drawPixmap(0, 0, skinTexture.copy(8, 8, 8, 8));
+            painter.drawPixmap(0, 0, skinTexture.copy(40, 8, 8, 8));
+            return skin.scaled(height, width, Qt::KeepAspectRatio);
         }
     }
 
diff --git a/api/logic/CMakeLists.txt b/api/logic/CMakeLists.txt
index 50c2cb6e..50eff4ba 100644
--- a/api/logic/CMakeLists.txt
+++ b/api/logic/CMakeLists.txt
@@ -119,8 +119,6 @@ set(NET_SOURCES
     net/PasteUpload.cpp
     net/PasteUpload.h
     net/Sink.h
-    net/URLConstants.cpp
-    net/URLConstants.h
     net/Validator.h
 )
 
@@ -259,8 +257,8 @@ set(MINECRAFT_SOURCES
     minecraft/LaunchProfile.h
     minecraft/Component.cpp
     minecraft/Component.h
-    minecraft/ComponentList.cpp
-    minecraft/ComponentList.h
+    minecraft/PackProfile.cpp
+    minecraft/PackProfile.h
     minecraft/ComponentUpdateTask.cpp
     minecraft/ComponentUpdateTask.h
     minecraft/MinecraftLoadAndCheck.h
@@ -491,7 +489,7 @@ set_target_properties(MultiMC_logic PROPERTIES CXX_VISIBILITY_PRESET hidden VISI
 generate_export_header(MultiMC_logic)
 
 # Link
-target_link_libraries(MultiMC_logic systeminfo MultiMC_quazip MultiMC_classparser ${NBT_NAME} ${ZLIB_LIBRARIES})
+target_link_libraries(MultiMC_logic systeminfo MultiMC_quazip MultiMC_classparser ${NBT_NAME} ${ZLIB_LIBRARIES} BuildConfig)
 target_link_libraries(MultiMC_logic Qt5::Core Qt5::Xml Qt5::Network Qt5::Concurrent)
 
 # Mark and export headers
diff --git a/api/logic/InstanceCreationTask.cpp b/api/logic/InstanceCreationTask.cpp
index 978d4687..eafc5126 100644
--- a/api/logic/InstanceCreationTask.cpp
+++ b/api/logic/InstanceCreationTask.cpp
@@ -4,7 +4,7 @@
 
 //FIXME: remove this
 #include "minecraft/MinecraftInstance.h"
-#include "minecraft/ComponentList.h"
+#include "minecraft/PackProfile.h"
 
 InstanceCreationTask::InstanceCreationTask(BaseVersionPtr version)
 {
@@ -20,7 +20,7 @@ void InstanceCreationTask::executeTask()
         instanceSettings->registerSetting("InstanceType", "Legacy");
         instanceSettings->set("InstanceType", "OneSix");
         MinecraftInstance inst(m_globalSettings, instanceSettings, m_stagingPath);
-        auto components = inst.getComponentList();
+        auto components = inst.getPackProfile();
         components->buildingFromScratch();
         components->setComponentVersion("net.minecraft", m_version->descriptor(), true);
         inst.setName(m_instName);
diff --git a/api/logic/InstanceImportTask.cpp b/api/logic/InstanceImportTask.cpp
index 1e93174c..e2187416 100644
--- a/api/logic/InstanceImportTask.cpp
+++ b/api/logic/InstanceImportTask.cpp
@@ -11,7 +11,7 @@
 
 // FIXME: this does not belong here, it's Minecraft/Flame specific
 #include "minecraft/MinecraftInstance.h"
-#include "minecraft/ComponentList.h"
+#include "minecraft/PackProfile.h"
 #include "modplatform/flame/FileResolvingTask.h"
 #include "modplatform/flame/PackManifest.h"
 #include "Json.h"
@@ -236,7 +236,7 @@ void InstanceImportTask::processFlame()
         mcVersion.remove(QRegExp("[.]+$"));
         logWarning(tr("Mysterious trailing dots removed from Minecraft version while importing pack."));
     }
-    auto components = instance.getComponentList();
+    auto components = instance.getPackProfile();
     components->buildingFromScratch();
     components->setComponentVersion("net.minecraft", mcVersion, true);
     if(!forgeVersion.isEmpty())
@@ -288,7 +288,7 @@ void InstanceImportTask::processFlame()
             qDebug() << info.fileName();
             jarMods.push_back(info.absoluteFilePath());
         }
-        auto profile = instance.getComponentList();
+        auto profile = instance.getPackProfile();
         profile->installJarMods(jarMods);
         // nuke the original files
         FS::deletePath(jarmodsPath);
diff --git a/api/logic/meta/BaseEntity.cpp b/api/logic/meta/BaseEntity.cpp
index ce0be859..31d79aa3 100644
--- a/api/logic/meta/BaseEntity.cpp
+++ b/api/logic/meta/BaseEntity.cpp
@@ -24,6 +24,8 @@
 #include "Env.h"
 #include "Json.h"
 
+#include "BuildConfig.h"
+
 class ParsingValidator : public Net::Validator
 {
 public: /* con/des */
@@ -53,7 +55,9 @@ public: /* methods */
         auto fname = m_entity->localFilename();
         try
         {
-            m_entity->parse(Json::requireObject(Json::requireDocument(data, fname), fname));
+            auto doc = Json::requireDocument(data, fname);
+            auto obj = Json::requireObject(doc, fname);
+            m_entity->parse(obj);
             return true;
         }
         catch (const Exception &e)
@@ -74,7 +78,7 @@ Meta::BaseEntity::~BaseEntity()
 
 QUrl Meta::BaseEntity::url() const
 {
-    return QUrl("https://meta.multimc.org/v1/").resolved(localFilename());
+    return QUrl(BuildConfig.META_URL).resolved(localFilename());
 }
 
 bool Meta::BaseEntity::loadLocalFile()
@@ -87,7 +91,9 @@ bool Meta::BaseEntity::loadLocalFile()
     // TODO: check if the file has the expected checksum
     try
     {
-        parse(Json::requireObject(Json::requireDocument(fname, fname), fname));
+        auto doc = Json::requireDocument(fname, fname);
+        auto obj = Json::requireObject(doc, fname);
+        parse(obj);
         return true;
     }
     catch (const Exception &e)
diff --git a/api/logic/meta/Version.cpp b/api/logic/meta/Version.cpp
index ca889550..2bbe19a7 100644
--- a/api/logic/meta/Version.cpp
+++ b/api/logic/meta/Version.cpp
@@ -18,7 +18,7 @@
 #include <QDateTime>
 
 #include "JsonFormat.h"
-#include "minecraft/ComponentList.h"
+#include "minecraft/PackProfile.h"
 
 Meta::Version::Version(const QString &uid, const QString &version)
     : BaseVersion(), m_uid(uid), m_version(version)
diff --git a/api/logic/minecraft/AssetsUtils.cpp b/api/logic/minecraft/AssetsUtils.cpp
index f94f68b1..68089080 100644
--- a/api/logic/minecraft/AssetsUtils.cpp
+++ b/api/logic/minecraft/AssetsUtils.cpp
@@ -27,7 +27,7 @@
 #include "FileSystem.h"
 #include "net/Download.h"
 #include "net/ChecksumValidator.h"
-#include "net/URLConstants.h"
+#include "BuildConfig.h"
 
 namespace {
 QSet<QString> collectPathsFromDir(QString dirPath)
@@ -308,7 +308,7 @@ QString AssetObject::getLocalPath()
 
 QUrl AssetObject::getUrl()
 {
-    return URLConstants::RESOURCE_BASE + getRelPath();
+    return BuildConfig.RESOURCE_BASE + getRelPath();
 }
 
 QString AssetObject::getRelPath()
diff --git a/api/logic/minecraft/Component.cpp b/api/logic/minecraft/Component.cpp
index 51957d17..92821065 100644
--- a/api/logic/minecraft/Component.cpp
+++ b/api/logic/minecraft/Component.cpp
@@ -5,13 +5,13 @@
 
 #include "meta/Version.h"
 #include "VersionFile.h"
-#include "minecraft/ComponentList.h"
+#include "minecraft/PackProfile.h"
 #include <FileSystem.h>
 #include <QSaveFile>
 #include "OneSixVersionFormat.h"
 #include <assert.h>
 
-Component::Component(ComponentList * parent, const QString& uid)
+Component::Component(PackProfile * parent, const QString& uid)
 {
     assert(parent);
     m_parent = parent;
@@ -19,7 +19,7 @@ Component::Component(ComponentList * parent, const QString& uid)
     m_uid = uid;
 }
 
-Component::Component(ComponentList * parent, std::shared_ptr<Meta::Version> version)
+Component::Component(PackProfile * parent, std::shared_ptr<Meta::Version> version)
 {
     assert(parent);
     m_parent = parent;
@@ -31,7 +31,7 @@ Component::Component(ComponentList * parent, std::shared_ptr<Meta::Version> vers
     m_loaded = version->isLoaded();
 }
 
-Component::Component(ComponentList * parent, const QString& uid, std::shared_ptr<VersionFile> file)
+Component::Component(PackProfile * parent, const QString& uid, std::shared_ptr<VersionFile> file)
 {
     assert(parent);
     m_parent = parent;
diff --git a/api/logic/minecraft/Component.h b/api/logic/minecraft/Component.h
index 6a0f86c8..cb202f7f 100644
--- a/api/logic/minecraft/Component.h
+++ b/api/logic/minecraft/Component.h
@@ -9,7 +9,7 @@
 #include "QObjectPtr.h"
 #include "multimc_logic_export.h"
 
-class ComponentList;
+class PackProfile;
 class LaunchProfile;
 namespace Meta
 {
@@ -22,11 +22,11 @@ class MULTIMC_LOGIC_EXPORT Component : public QObject, public ProblemProvider
 {
 Q_OBJECT
 public:
-    Component(ComponentList * parent, const QString &uid);
+    Component(PackProfile * parent, const QString &uid);
 
     // DEPRECATED: remove these constructors?
-    Component(ComponentList * parent, std::shared_ptr<Meta::Version> version);
-    Component(ComponentList * parent, const QString & uid, std::shared_ptr<VersionFile> file);
+    Component(PackProfile * parent, std::shared_ptr<Meta::Version> version);
+    Component(PackProfile * parent, const QString & uid, std::shared_ptr<VersionFile> file);
 
     virtual ~Component(){};
     void applyTo(LaunchProfile *profile);
@@ -73,7 +73,7 @@ signals:
     void dataChanged();
 
 public: /* data */
-    ComponentList * m_parent;
+    PackProfile * m_parent;
 
     // BEGIN: persistent component list properties
     /// ID of the component
diff --git a/api/logic/minecraft/ComponentUpdateTask.cpp b/api/logic/minecraft/ComponentUpdateTask.cpp
index 84c0474c..241d9a49 100644
--- a/api/logic/minecraft/ComponentUpdateTask.cpp
+++ b/api/logic/minecraft/ComponentUpdateTask.cpp
@@ -1,7 +1,7 @@
 #include "ComponentUpdateTask.h"
 
-#include "ComponentList_p.h"
-#include "ComponentList.h"
+#include "PackProfile_p.h"
+#include "PackProfile.h"
 #include "Component.h"
 #include <Env.h>
 #include <meta/Index.h>
@@ -22,16 +22,16 @@
  * Really, it should be a reactor/state machine that receives input from the application
  * and dynamically adapts to changing requirements...
  *
- * The reactor should be the only entry into manipulating the ComponentList.
+ * The reactor should be the only entry into manipulating the PackProfile.
  * See: https://en.wikipedia.org/wiki/Reactor_pattern
  */
 
 /*
- * Or make this operate on a snapshot of the ComponentList state, then merge results in as long as the snapshot and ComponentList didn't change?
+ * Or make this operate on a snapshot of the PackProfile state, then merge results in as long as the snapshot and PackProfile didn't change?
  * If the component list changes, start over.
  */
 
-ComponentUpdateTask::ComponentUpdateTask(Mode mode, Net::Mode netmode, ComponentList* list, QObject* parent)
+ComponentUpdateTask::ComponentUpdateTask(Mode mode, Net::Mode netmode, PackProfile* list, QObject* parent)
     : Task(parent)
 {
     d.reset(new ComponentUpdateTaskData);
@@ -126,7 +126,7 @@ static LoadResult loadComponent(ComponentPtr component, shared_qobject_ptr<Task>
 
 // FIXME: dead code. determine if this can still be useful?
 /*
-static LoadResult loadComponentList(ComponentPtr component, shared_qobject_ptr<Task>& loadTask, Net::Mode netmode)
+static LoadResult loadPackProfile(ComponentPtr component, shared_qobject_ptr<Task>& loadTask, Net::Mode netmode)
 {
     if(component->m_loaded)
     {
@@ -217,7 +217,7 @@ void ComponentUpdateTask::loadComponents()
             }
             case Mode::Resolution:
             {
-                singleResult = loadComponentList(component, loadTask, d->netmode);
+                singleResult = loadPackProfile(component, loadTask, d->netmode);
                 loadType = RemoteLoadStatus::Type::List;
                 break;
             }
@@ -244,7 +244,7 @@ void ComponentUpdateTask::loadComponents()
             });
             RemoteLoadStatus status;
             status.type = loadType;
-            status.componentListIndex = componentIndex;
+            status.PackProfileIndex = componentIndex;
             d->remoteLoadStatusList.append(status);
             taskIndex++;
         }
@@ -495,7 +495,7 @@ static bool getTrivialComponentChanges(const ComponentIndex & index, const Requi
 }
 
 // FIXME, TODO: decouple dependency resolution from loading
-// FIXME: This works directly with the ComponentList internals. It shouldn't! It needs richer data types than ComponentList uses.
+// FIXME: This works directly with the PackProfile internals. It shouldn't! It needs richer data types than PackProfile uses.
 // FIXME: throw all this away and use a graph
 void ComponentUpdateTask::resolveDependencies(bool checkOnly)
 {
@@ -648,7 +648,7 @@ void ComponentUpdateTask::remoteLoadSucceeded(size_t taskIndex)
     // update the cached data of the component from the downloaded version file.
     if (taskSlot.type == RemoteLoadStatus::Type::Version)
     {
-        auto component = d->m_list->getComponent(taskSlot.componentListIndex);
+        auto component = d->m_list->getComponent(taskSlot.PackProfileIndex);
         component->m_loaded = true;
         component->updateCachedData();
     }
diff --git a/api/logic/minecraft/ComponentUpdateTask.h b/api/logic/minecraft/ComponentUpdateTask.h
index 4cb29a89..4274cabb 100644
--- a/api/logic/minecraft/ComponentUpdateTask.h
+++ b/api/logic/minecraft/ComponentUpdateTask.h
@@ -4,7 +4,7 @@
 #include "net/Mode.h"
 
 #include <memory>
-class ComponentList;
+class PackProfile;
 struct ComponentUpdateTaskData;
 
 class ComponentUpdateTask : public Task
@@ -18,7 +18,7 @@ public:
     };
 
 public:
-    explicit ComponentUpdateTask(Mode mode, Net::Mode netmode, ComponentList * list, QObject *parent = 0);
+    explicit ComponentUpdateTask(Mode mode, Net::Mode netmode, PackProfile * list, QObject *parent = 0);
     virtual ~ComponentUpdateTask();
 
 protected:
diff --git a/api/logic/minecraft/ComponentUpdateTask_p.h b/api/logic/minecraft/ComponentUpdateTask_p.h
index 5989cf07..5b02431b 100644
--- a/api/logic/minecraft/ComponentUpdateTask_p.h
+++ b/api/logic/minecraft/ComponentUpdateTask_p.h
@@ -5,7 +5,7 @@
 #include <QList>
 #include "net/Mode.h"
 
-class ComponentList;
+class PackProfile;
 
 struct RemoteLoadStatus
 {
@@ -15,7 +15,7 @@ struct RemoteLoadStatus
         List,
         Version
     } type = Type::Version;
-    size_t componentListIndex = 0;
+    size_t PackProfileIndex = 0;
     bool finished = false;
     bool succeeded = false;
     QString error;
@@ -23,7 +23,7 @@ struct RemoteLoadStatus
 
 struct ComponentUpdateTaskData
 {
-    ComponentList * m_list = nullptr;
+    PackProfile * m_list = nullptr;
     QList<RemoteLoadStatus> remoteLoadStatusList;
     bool remoteLoadSuccessful = true;
     size_t remoteTasksInProgress = 0;
diff --git a/api/logic/minecraft/Library.cpp b/api/logic/minecraft/Library.cpp
index 9ff8dcdc..b3c7657c 100644
--- a/api/logic/minecraft/Library.cpp
+++ b/api/logic/minecraft/Library.cpp
@@ -5,6 +5,7 @@
 #include <net/ChecksumValidator.h>
 #include <Env.h>
 #include <FileSystem.h>
+#include <BuildConfig.h>
 
 
 void Library::getApplicableFiles(OpSys system, QStringList& jar, QStringList& native, QStringList& native32,
@@ -171,7 +172,7 @@ QList< std::shared_ptr< NetAction > > Library::getDownloads(
 
             if (m_repositoryURL.isEmpty())
             {
-                return URLConstants::LIBRARY_BASE + raw_storage;
+                return BuildConfig.LIBRARY_BASE + raw_storage;
             }
 
             if(m_repositoryURL.endsWith('/'))
diff --git a/api/logic/minecraft/Library.h b/api/logic/minecraft/Library.h
index 014f6745..acdd6c9c 100644
--- a/api/logic/minecraft/Library.h
+++ b/api/logic/minecraft/Library.h
@@ -12,7 +12,6 @@
 #include "Rule.h"
 #include "minecraft/OpSys.h"
 #include "GradleSpecifier.h"
-#include "net/URLConstants.h"
 #include "MojangDownloadInfo.h"
 
 #include "multimc_logic_export.h"
diff --git a/api/logic/minecraft/MinecraftInstance.cpp b/api/logic/minecraft/MinecraftInstance.cpp
index 912a3829..9b1a7dbc 100644
--- a/api/logic/minecraft/MinecraftInstance.cpp
+++ b/api/logic/minecraft/MinecraftInstance.cpp
@@ -33,7 +33,7 @@
 #include "icons/IIconList.h"
 
 #include <QCoreApplication>
-#include "ComponentList.h"
+#include "PackProfile.h"
 #include "AssetsUtils.h"
 #include "MinecraftUpdate.h"
 #include "MinecraftLoadAndCheck.h"
@@ -106,7 +106,7 @@ MinecraftInstance::MinecraftInstance(SettingsObjectPtr globalSettings, SettingsO
     m_settings->registerSetting("ForgeVersion", "");
     m_settings->registerSetting("LiteloaderVersion", "");
 
-    m_components.reset(new ComponentList(this));
+    m_components.reset(new PackProfile(this));
     m_components->setOldConfigVersion("net.minecraft", m_settings->get("IntendedVersion").toString());
     auto setting = m_settings->getSetting("LWJGLVersion");
     m_components->setOldConfigVersion("org.lwjgl", m_settings->get("LWJGLVersion").toString());
@@ -124,14 +124,14 @@ QString MinecraftInstance::typeName() const
     return "Minecraft";
 }
 
-std::shared_ptr<ComponentList> MinecraftInstance::getComponentList() const
+std::shared_ptr<PackProfile> MinecraftInstance::getPackProfile() const
 {
     return m_components;
 }
 
 QSet<QString> MinecraftInstance::traits() const
 {
-    auto components = getComponentList();
+    auto components = getPackProfile();
     if (!components)
     {
         return {"version-incomplete"};
@@ -265,7 +265,7 @@ QStringList MinecraftInstance::getNativeJars() const
 QStringList MinecraftInstance::extraArguments() const
 {
     auto list = BaseInstance::extraArguments();
-    auto version = getComponentList();
+    auto version = getPackProfile();
     if (!version)
         return list;
     auto jarMods = getJarMods();
diff --git a/api/logic/minecraft/MinecraftInstance.h b/api/logic/minecraft/MinecraftInstance.h
index a8f64109..985a8a76 100644
--- a/api/logic/minecraft/MinecraftInstance.h
+++ b/api/logic/minecraft/MinecraftInstance.h
@@ -10,7 +10,7 @@ class ModFolderModel;
 class WorldList;
 class GameOptions;
 class LaunchStep;
-class ComponentList;
+class PackProfile;
 
 class MULTIMC_LOGIC_EXPORT MinecraftInstance: public BaseInstance
 {
@@ -64,7 +64,7 @@ public:
 
 
     //////  Profile management //////
-    std::shared_ptr<ComponentList> getComponentList() const;
+    std::shared_ptr<PackProfile> getPackProfile() const;
 
     //////  Mod Lists  //////
     std::shared_ptr<ModFolderModel> loaderModList() const;
@@ -120,7 +120,7 @@ private:
     QString prettifyTimeDuration(int64_t duration);
 
 protected: // data
-    std::shared_ptr<ComponentList> m_components;
+    std::shared_ptr<PackProfile> m_components;
     mutable std::shared_ptr<ModFolderModel> m_loader_mod_list;
     mutable std::shared_ptr<ModFolderModel> m_core_mod_list;
     mutable std::shared_ptr<ModFolderModel> m_resource_pack_list;
diff --git a/api/logic/minecraft/MinecraftLoadAndCheck.cpp b/api/logic/minecraft/MinecraftLoadAndCheck.cpp
index 593e2fc4..79b0c484 100644
--- a/api/logic/minecraft/MinecraftLoadAndCheck.cpp
+++ b/api/logic/minecraft/MinecraftLoadAndCheck.cpp
@@ -1,6 +1,6 @@
 #include "MinecraftLoadAndCheck.h"
 #include "MinecraftInstance.h"
-#include "ComponentList.h"
+#include "PackProfile.h"
 
 MinecraftLoadAndCheck::MinecraftLoadAndCheck(MinecraftInstance *inst, QObject *parent) : Task(parent), m_inst(inst)
 {
@@ -9,7 +9,7 @@ MinecraftLoadAndCheck::MinecraftLoadAndCheck(MinecraftInstance *inst, QObject *p
 void MinecraftLoadAndCheck::executeTask()
 {
     // add offline metadata load task
-    auto components = m_inst->getComponentList();
+    auto components = m_inst->getPackProfile();
     components->reload(Net::Mode::Offline);
     m_task = components->getCurrentTask();
 
diff --git a/api/logic/minecraft/MinecraftUpdate.cpp b/api/logic/minecraft/MinecraftUpdate.cpp
index f9ff114d..68dd437d 100644
--- a/api/logic/minecraft/MinecraftUpdate.cpp
+++ b/api/logic/minecraft/MinecraftUpdate.cpp
@@ -23,9 +23,8 @@
 #include <QDataStream>
 
 #include "BaseInstance.h"
-#include "minecraft/ComponentList.h"
+#include "minecraft/PackProfile.h"
 #include "minecraft/Library.h"
-#include "net/URLConstants.h"
 #include <FileSystem.h>
 
 #include "update/FoldersTask.h"
@@ -50,7 +49,7 @@ void MinecraftUpdate::executeTask()
 
     // add metadata update task if necessary
     {
-        auto components = m_inst->getComponentList();
+        auto components = m_inst->getPackProfile();
         components->reload(Net::Mode::Online);
         auto task = components->getCurrentTask();
         if(task)
diff --git a/api/logic/minecraft/OneSixVersionFormat.cpp b/api/logic/minecraft/OneSixVersionFormat.cpp
index a0b6fd0e..7ac9e2db 100644
--- a/api/logic/minecraft/OneSixVersionFormat.cpp
+++ b/api/logic/minecraft/OneSixVersionFormat.cpp
@@ -198,7 +198,10 @@ VersionFilePtr OneSixVersionFormat::versionFileFromJson(const QJsonDocument &doc
         // FIXME: this will eventually break...
         else
         {
-            lib->setAbsoluteUrl(URLConstants::getLegacyJarUrl(out->minecraftVersion));
+            out->addProblem(
+                ProblemSeverity::Error,
+                QObject::tr("URL for the main jar could not be determined - Mojang removed the server that we used as fallback.")
+            );
         }
         out->mainJar = lib;
     }
diff --git a/api/logic/minecraft/OneSixVersionFormat.h b/api/logic/minecraft/OneSixVersionFormat.h
index 6bbebca0..14ae385c 100644
--- a/api/logic/minecraft/OneSixVersionFormat.h
+++ b/api/logic/minecraft/OneSixVersionFormat.h
@@ -1,7 +1,7 @@
 #pragma once
 
 #include <minecraft/VersionFile.h>
-#include <minecraft/ComponentList.h>
+#include <minecraft/PackProfile.h>
 #include <minecraft/Library.h>
 #include <QJsonDocument>
 
diff --git a/api/logic/minecraft/ComponentList.cpp b/api/logic/minecraft/PackProfile.cpp
similarity index 89%
rename from api/logic/minecraft/ComponentList.cpp
rename to api/logic/minecraft/PackProfile.cpp
index 51fe214d..15f2f55d 100644
--- a/api/logic/minecraft/ComponentList.cpp
+++ b/api/logic/minecraft/PackProfile.cpp
@@ -32,23 +32,23 @@
 #include <QTimer>
 #include <Json.h>
 
-#include "ComponentList.h"
-#include "ComponentList_p.h"
+#include "PackProfile.h"
+#include "PackProfile_p.h"
 #include "ComponentUpdateTask.h"
 
-ComponentList::ComponentList(MinecraftInstance * instance)
+PackProfile::PackProfile(MinecraftInstance * instance)
     : QAbstractListModel()
 {
-    d.reset(new ComponentListData);
+    d.reset(new PackProfileData);
     d->m_instance = instance;
     d->m_saveTimer.setSingleShot(true);
     d->m_saveTimer.setInterval(5000);
     d->interactionDisabled = instance->isRunning();
-    connect(d->m_instance, &BaseInstance::runningStatusChanged, this, &ComponentList::disableInteraction);
-    connect(&d->m_saveTimer, &QTimer::timeout, this, &ComponentList::save_internal);
+    connect(d->m_instance, &BaseInstance::runningStatusChanged, this, &PackProfile::disableInteraction);
+    connect(&d->m_saveTimer, &QTimer::timeout, this, &PackProfile::save_internal);
 }
 
-ComponentList::~ComponentList()
+PackProfile::~PackProfile()
 {
     saveNow();
 }
@@ -97,7 +97,7 @@ static QJsonObject componentToJsonV1(ComponentPtr component)
     return obj;
 }
 
-static ComponentPtr componentFromJsonV1(ComponentList * parent, const QString & componentJsonPattern, const QJsonObject &obj)
+static ComponentPtr componentFromJsonV1(PackProfile * parent, const QString & componentJsonPattern, const QJsonObject &obj)
 {
     // critical
     auto uid = Json::requireString(obj.value("uid"));
@@ -120,7 +120,7 @@ static ComponentPtr componentFromJsonV1(ComponentList * parent, const QString &
 }
 
 // Save the given component container data to a file
-static bool saveComponentList(const QString & filename, const ComponentContainer & container)
+static bool savePackProfile(const QString & filename, const ComponentContainer & container)
 {
     QJsonObject obj;
     obj.insert("formatVersion", currentComponentsFileVersion);
@@ -153,7 +153,7 @@ static bool saveComponentList(const QString & filename, const ComponentContainer
 }
 
 // Read the given file into component containers
-static bool loadComponentList(ComponentList * parent, const QString & filename, const QString & componentJsonPattern, ComponentContainer & container)
+static bool loadPackProfile(PackProfile * parent, const QString & filename, const QString & componentJsonPattern, ComponentContainer & container)
 {
     QFile componentsFile(filename);
     if (!componentsFile.exists())
@@ -210,7 +210,7 @@ static bool loadComponentList(ComponentList * parent, const QString & filename,
 
 // BEGIN: save/load logic
 
-void ComponentList::saveNow()
+void PackProfile::saveNow()
 {
     if(saveIsScheduled())
     {
@@ -219,18 +219,18 @@ void ComponentList::saveNow()
     }
 }
 
-bool ComponentList::saveIsScheduled() const
+bool PackProfile::saveIsScheduled() const
 {
     return d->dirty;
 }
 
-void ComponentList::buildingFromScratch()
+void PackProfile::buildingFromScratch()
 {
     d->loaded = true;
     d->dirty = true;
 }
 
-void ComponentList::scheduleSave()
+void PackProfile::scheduleSave()
 {
     if(!d->loaded)
     {
@@ -245,30 +245,30 @@ void ComponentList::scheduleSave()
     d->m_saveTimer.start();
 }
 
-QString ComponentList::componentsFilePath() const
+QString PackProfile::componentsFilePath() const
 {
     return FS::PathCombine(d->m_instance->instanceRoot(), "mmc-pack.json");
 }
 
-QString ComponentList::patchesPattern() const
+QString PackProfile::patchesPattern() const
 {
     return FS::PathCombine(d->m_instance->instanceRoot(), "patches", "%1.json");
 }
 
-QString ComponentList::patchFilePathForUid(const QString& uid) const
+QString PackProfile::patchFilePathForUid(const QString& uid) const
 {
     return patchesPattern().arg(uid);
 }
 
-void ComponentList::save_internal()
+void PackProfile::save_internal()
 {
     qDebug() << "Component list save performed now for" << d->m_instance->name();
     auto filename = componentsFilePath();
-    saveComponentList(filename, d->components);
+    savePackProfile(filename, d->components);
     d->dirty = false;
 }
 
-bool ComponentList::load()
+bool PackProfile::load()
 {
     auto filename = componentsFilePath();
     QFile componentsFile(filename);
@@ -286,7 +286,7 @@ bool ComponentList::load()
 
     // load the new component list and swap it with the current one...
     ComponentContainer newComponents;
-    if(!loadComponentList(this, filename, patchesPattern(), newComponents))
+    if(!loadPackProfile(this, filename, patchesPattern(), newComponents))
     {
         qCritical() << "Failed to load the component config for instance" << d->m_instance->name();
         return false;
@@ -298,7 +298,7 @@ bool ComponentList::load()
         // disconnect all the old components
         for(auto component: d->components)
         {
-            disconnect(component.get(), &Component::dataChanged, this, &ComponentList::componentDataChanged);
+            disconnect(component.get(), &Component::dataChanged, this, &PackProfile::componentDataChanged);
         }
         d->components.clear();
         d->componentIndex.clear();
@@ -309,7 +309,7 @@ bool ComponentList::load()
                 qWarning() << "Ignoring duplicate component entry" << component->m_uid;
                 continue;
             }
-            connect(component.get(), &Component::dataChanged, this, &ComponentList::componentDataChanged);
+            connect(component.get(), &Component::dataChanged, this, &PackProfile::componentDataChanged);
             d->components.append(component);
             d->componentIndex[component->m_uid] = component;
         }
@@ -319,7 +319,7 @@ bool ComponentList::load()
     }
 }
 
-void ComponentList::reload(Net::Mode netmode)
+void PackProfile::reload(Net::Mode netmode)
 {
     // Do not reload when the update/resolve task is running. It is in control.
     if(d->m_updateTask)
@@ -339,29 +339,29 @@ void ComponentList::reload(Net::Mode netmode)
     }
 }
 
-shared_qobject_ptr<Task> ComponentList::getCurrentTask()
+shared_qobject_ptr<Task> PackProfile::getCurrentTask()
 {
     return d->m_updateTask;
 }
 
-void ComponentList::resolve(Net::Mode netmode)
+void PackProfile::resolve(Net::Mode netmode)
 {
     auto updateTask = new ComponentUpdateTask(ComponentUpdateTask::Mode::Resolution, netmode, this);
     d->m_updateTask.reset(updateTask);
-    connect(updateTask, &ComponentUpdateTask::succeeded, this, &ComponentList::updateSucceeded);
-    connect(updateTask, &ComponentUpdateTask::failed, this, &ComponentList::updateFailed);
+    connect(updateTask, &ComponentUpdateTask::succeeded, this, &PackProfile::updateSucceeded);
+    connect(updateTask, &ComponentUpdateTask::failed, this, &PackProfile::updateFailed);
     d->m_updateTask->start();
 }
 
 
-void ComponentList::updateSucceeded()
+void PackProfile::updateSucceeded()
 {
     qDebug() << "Component list update/resolve task succeeded for" << d->m_instance->name();
     d->m_updateTask.reset();
     invalidateLaunchProfile();
 }
 
-void ComponentList::updateFailed(const QString& error)
+void PackProfile::updateFailed(const QString& error)
 {
     qDebug() << "Component list update/resolve task failed for" << d->m_instance->name() << "Reason:" << error;
     d->m_updateTask.reset();
@@ -431,7 +431,7 @@ static void upgradeDeprecatedFiles(QString root, QString instanceName)
  * - Part is taken from the old order.json file.
  * - Part is loaded from loose json files in the instance's `patches` directory.
  */
-bool ComponentList::migratePreComponentConfig()
+bool PackProfile::migratePreComponentConfig()
 {
     // upgrade the very old files from the beginnings of MultiMC 5
     upgradeDeprecatedFiles(d->m_instance->instanceRoot(), d->m_instance->name());
@@ -598,17 +598,17 @@ bool ComponentList::migratePreComponentConfig()
         }
     }
     // new we have a complete list of components...
-    return saveComponentList(componentsFilePath(), components);
+    return savePackProfile(componentsFilePath(), components);
 }
 
 // END: save/load
 
-void ComponentList::appendComponent(ComponentPtr component)
+void PackProfile::appendComponent(ComponentPtr component)
 {
     insertComponent(d->components.size(), component);
 }
 
-void ComponentList::insertComponent(size_t index, ComponentPtr component)
+void PackProfile::insertComponent(size_t index, ComponentPtr component)
 {
     auto id = component->getID();
     if(id.isEmpty())
@@ -625,16 +625,16 @@ void ComponentList::insertComponent(size_t index, ComponentPtr component)
     d->components.insert(index, component);
     d->componentIndex[id] = component;
     endInsertRows();
-    connect(component.get(), &Component::dataChanged, this, &ComponentList::componentDataChanged);
+    connect(component.get(), &Component::dataChanged, this, &PackProfile::componentDataChanged);
     scheduleSave();
 }
 
-void ComponentList::componentDataChanged()
+void PackProfile::componentDataChanged()
 {
     auto objPtr = qobject_cast<Component *>(sender());
     if(!objPtr)
     {
-        qWarning() << "ComponentList got dataChenged signal from a non-Component!";
+        qWarning() << "PackProfile got dataChenged signal from a non-Component!";
         return;
     }
     if(objPtr->getID() == "net.minecraft") {
@@ -652,10 +652,10 @@ void ComponentList::componentDataChanged()
         }
         index++;
     }
-    qWarning() << "ComponentList got dataChenged signal from a Component which does not belong to it!";
+    qWarning() << "PackProfile got dataChenged signal from a Component which does not belong to it!";
 }
 
-bool ComponentList::remove(const int index)
+bool PackProfile::remove(const int index)
 {
     auto patch = getComponent(index);
     if (!patch->isRemovable())
@@ -679,7 +679,7 @@ bool ComponentList::remove(const int index)
     return true;
 }
 
-bool ComponentList::remove(const QString id)
+bool PackProfile::remove(const QString id)
 {
     int i = 0;
     for (auto patch : d->components)
@@ -693,7 +693,7 @@ bool ComponentList::remove(const QString id)
     return false;
 }
 
-bool ComponentList::customize(int index)
+bool PackProfile::customize(int index)
 {
     auto patch = getComponent(index);
     if (!patch->isCustomizable())
@@ -711,7 +711,7 @@ bool ComponentList::customize(int index)
     return true;
 }
 
-bool ComponentList::revertToBase(int index)
+bool PackProfile::revertToBase(int index)
 {
     auto patch = getComponent(index);
     if (!patch->isRevertible())
@@ -729,7 +729,7 @@ bool ComponentList::revertToBase(int index)
     return true;
 }
 
-Component * ComponentList::getComponent(const QString &id)
+Component * PackProfile::getComponent(const QString &id)
 {
     auto iter = d->componentIndex.find(id);
     if (iter == d->componentIndex.end())
@@ -739,7 +739,7 @@ Component * ComponentList::getComponent(const QString &id)
     return (*iter).get();
 }
 
-Component * ComponentList::getComponent(int index)
+Component * PackProfile::getComponent(int index)
 {
     if(index < 0 || index >= d->components.size())
     {
@@ -748,7 +748,7 @@ Component * ComponentList::getComponent(int index)
     return d->components[index].get();
 }
 
-QVariant ComponentList::data(const QModelIndex &index, int role) const
+QVariant PackProfile::data(const QModelIndex &index, int role) const
 {
     if (!index.isValid())
         return QVariant();
@@ -822,7 +822,7 @@ QVariant ComponentList::data(const QModelIndex &index, int role) const
     return QVariant();
 }
 
-bool ComponentList::setData(const QModelIndex& index, const QVariant& value, int role)
+bool PackProfile::setData(const QModelIndex& index, const QVariant& value, int role)
 {
     if (!index.isValid() || index.row() < 0 || index.row() >= rowCount(index))
     {
@@ -840,7 +840,7 @@ bool ComponentList::setData(const QModelIndex& index, const QVariant& value, int
     return false;
 }
 
-QVariant ComponentList::headerData(int section, Qt::Orientation orientation, int role) const
+QVariant PackProfile::headerData(int section, Qt::Orientation orientation, int role) const
 {
     if (orientation == Qt::Horizontal)
     {
@@ -861,7 +861,7 @@ QVariant ComponentList::headerData(int section, Qt::Orientation orientation, int
 }
 
 // FIXME: zero precision mess
-Qt::ItemFlags ComponentList::flags(const QModelIndex &index) const
+Qt::ItemFlags PackProfile::flags(const QModelIndex &index) const
 {
     if (!index.isValid()) {
         return Qt::NoItemFlags;
@@ -884,17 +884,17 @@ Qt::ItemFlags ComponentList::flags(const QModelIndex &index) const
     return outFlags;
 }
 
-int ComponentList::rowCount(const QModelIndex &parent) const
+int PackProfile::rowCount(const QModelIndex &parent) const
 {
     return d->components.size();
 }
 
-int ComponentList::columnCount(const QModelIndex &parent) const
+int PackProfile::columnCount(const QModelIndex &parent) const
 {
     return NUM_COLUMNS;
 }
 
-void ComponentList::move(const int index, const MoveDirection direction)
+void PackProfile::move(const int index, const MoveDirection direction)
 {
     int theirIndex;
     if (direction == MoveUp)
@@ -930,22 +930,22 @@ void ComponentList::move(const int index, const MoveDirection direction)
     scheduleSave();
 }
 
-void ComponentList::invalidateLaunchProfile()
+void PackProfile::invalidateLaunchProfile()
 {
     d->m_profile.reset();
 }
 
-void ComponentList::installJarMods(QStringList selectedFiles)
+void PackProfile::installJarMods(QStringList selectedFiles)
 {
     installJarMods_internal(selectedFiles);
 }
 
-void ComponentList::installCustomJar(QString selectedFile)
+void PackProfile::installCustomJar(QString selectedFile)
 {
     installCustomJar_internal(selectedFile);
 }
 
-bool ComponentList::installEmpty(const QString& uid, const QString& name)
+bool PackProfile::installEmpty(const QString& uid, const QString& name)
 {
     QString patchDir = FS::PathCombine(d->m_instance->instanceRoot(), "patches");
     if(!FS::ensureFolderPathExists(patchDir))
@@ -973,7 +973,7 @@ bool ComponentList::installEmpty(const QString& uid, const QString& name)
     return true;
 }
 
-bool ComponentList::removeComponent_internal(ComponentPtr patch)
+bool PackProfile::removeComponent_internal(ComponentPtr patch)
 {
     bool ok = true;
     // first, remove the patch file. this ensures it's not used anymore
@@ -1023,7 +1023,7 @@ bool ComponentList::removeComponent_internal(ComponentPtr patch)
     return ok;
 }
 
-bool ComponentList::installJarMods_internal(QStringList filepaths)
+bool PackProfile::installJarMods_internal(QStringList filepaths)
 {
     QString patchDir = FS::PathCombine(d->m_instance->instanceRoot(), "patches");
     if(!FS::ensureFolderPathExists(patchDir))
@@ -1085,7 +1085,7 @@ bool ComponentList::installJarMods_internal(QStringList filepaths)
     return true;
 }
 
-bool ComponentList::installCustomJar_internal(QString filepath)
+bool PackProfile::installCustomJar_internal(QString filepath)
 {
     QString patchDir = FS::PathCombine(d->m_instance->instanceRoot(), "patches");
     if(!FS::ensureFolderPathExists(patchDir))
@@ -1146,7 +1146,7 @@ bool ComponentList::installCustomJar_internal(QString filepath)
     return true;
 }
 
-std::shared_ptr<LaunchProfile> ComponentList::getProfile() const
+std::shared_ptr<LaunchProfile> PackProfile::getProfile() const
 {
     if(!d->m_profile)
     {
@@ -1168,7 +1168,7 @@ std::shared_ptr<LaunchProfile> ComponentList::getProfile() const
     return d->m_profile;
 }
 
-void ComponentList::setOldConfigVersion(const QString& uid, const QString& version)
+void PackProfile::setOldConfigVersion(const QString& uid, const QString& version)
 {
     if(version.isEmpty())
     {
@@ -1177,7 +1177,7 @@ void ComponentList::setOldConfigVersion(const QString& uid, const QString& versi
     d->m_oldConfigVersions[uid] = version;
 }
 
-bool ComponentList::setComponentVersion(const QString& uid, const QString& version, bool important)
+bool PackProfile::setComponentVersion(const QString& uid, const QString& version, bool important)
 {
     auto iter = d->componentIndex.find(uid);
     if(iter != d->componentIndex.end())
@@ -1203,7 +1203,7 @@ bool ComponentList::setComponentVersion(const QString& uid, const QString& versi
     }
 }
 
-QString ComponentList::getComponentVersion(const QString& uid) const
+QString PackProfile::getComponentVersion(const QString& uid) const
 {
     const auto iter = d->componentIndex.find(uid);
     if (iter != d->componentIndex.end())
@@ -1213,7 +1213,7 @@ QString ComponentList::getComponentVersion(const QString& uid) const
     return QString();
 }
 
-void ComponentList::disableInteraction(bool disable)
+void PackProfile::disableInteraction(bool disable)
 {
     if(d->interactionDisabled != disable) {
         d->interactionDisabled = disable;
diff --git a/api/logic/minecraft/ComponentList.h b/api/logic/minecraft/PackProfile.h
similarity index 95%
rename from api/logic/minecraft/ComponentList.h
rename to api/logic/minecraft/PackProfile.h
index 7b5e1385..66cd5e3e 100644
--- a/api/logic/minecraft/ComponentList.h
+++ b/api/logic/minecraft/PackProfile.h
@@ -31,10 +31,10 @@
 #include "net/Mode.h"
 
 class MinecraftInstance;
-struct ComponentListData;
+struct PackProfileData;
 class ComponentUpdateTask;
 
-class MULTIMC_LOGIC_EXPORT ComponentList : public QAbstractListModel
+class MULTIMC_LOGIC_EXPORT PackProfile : public QAbstractListModel
 {
     Q_OBJECT
     friend ComponentUpdateTask;
@@ -46,8 +46,8 @@ public:
         NUM_COLUMNS
     };
 
-    explicit ComponentList(MinecraftInstance * instance);
-    virtual ~ComponentList();
+    explicit PackProfile(MinecraftInstance * instance);
+    virtual ~PackProfile();
 
     virtual QVariant data(const QModelIndex &index, int role = Qt::DisplayRole) const override;
     virtual bool setData(const QModelIndex &index, const QVariant &value, int role = Qt::EditRole) override;
@@ -146,5 +146,5 @@ private:
 
 private: /* data */
 
-    std::unique_ptr<ComponentListData> d;
+    std::unique_ptr<PackProfileData> d;
 };
diff --git a/api/logic/minecraft/ComponentList_p.h b/api/logic/minecraft/PackProfile_p.h
similarity index 93%
rename from api/logic/minecraft/ComponentList_p.h
rename to api/logic/minecraft/PackProfile_p.h
index 7a3d498b..6cd2a4e5 100644
--- a/api/logic/minecraft/ComponentList_p.h
+++ b/api/logic/minecraft/PackProfile_p.h
@@ -9,9 +9,8 @@
 class MinecraftInstance;
 using ComponentContainer = QList<ComponentPtr>;
 using ComponentIndex = QMap<QString, ComponentPtr>;
-using ConnectionList = QList<QMetaObject::Connection>;
 
-struct ComponentListData
+struct PackProfileData
 {
     // the instance this belongs to
     MinecraftInstance *m_instance;
diff --git a/api/logic/minecraft/VersionFile.cpp b/api/logic/minecraft/VersionFile.cpp
index 5bad57e9..d0a1a507 100644
--- a/api/logic/minecraft/VersionFile.cpp
+++ b/api/logic/minecraft/VersionFile.cpp
@@ -5,7 +5,7 @@
 
 #include "minecraft/VersionFile.h"
 #include "minecraft/Library.h"
-#include "minecraft/ComponentList.h"
+#include "minecraft/PackProfile.h"
 #include "ParseUtils.h"
 
 #include <Version.h>
diff --git a/api/logic/minecraft/VersionFile.h b/api/logic/minecraft/VersionFile.h
index 29ddd0bc..b79fcd4f 100644
--- a/api/logic/minecraft/VersionFile.h
+++ b/api/logic/minecraft/VersionFile.h
@@ -12,7 +12,7 @@
 #include "Library.h"
 #include <meta/JsonFormat.h>
 
-class ComponentList;
+class PackProfile;
 class VersionFile;
 class LaunchProfile;
 struct MojangDownloadInfo;
diff --git a/api/logic/minecraft/auth/YggdrasilTask.cpp b/api/logic/minecraft/auth/YggdrasilTask.cpp
index 71f5d950..570fe1ea 100644
--- a/api/logic/minecraft/auth/YggdrasilTask.cpp
+++ b/api/logic/minecraft/auth/YggdrasilTask.cpp
@@ -25,7 +25,7 @@
 
 #include <Env.h>
 
-#include <net/URLConstants.h>
+#include <BuildConfig.h>
 
 #include <QDebug>
 
@@ -42,7 +42,7 @@ void YggdrasilTask::executeTask()
     // Get the content of the request we're going to send to the server.
     QJsonDocument doc(getRequestContent());
 
-    QUrl reqUrl(URLConstants::AUTH_BASE + getEndpoint());
+    QUrl reqUrl(BuildConfig.AUTH_BASE + getEndpoint());
     QNetworkRequest netRequest(reqUrl);
     netRequest.setHeader(QNetworkRequest::ContentTypeHeader, "application/json");
 
diff --git a/api/logic/minecraft/launch/ModMinecraftJar.cpp b/api/logic/minecraft/launch/ModMinecraftJar.cpp
index ceaad175..ba43a68d 100644
--- a/api/logic/minecraft/launch/ModMinecraftJar.cpp
+++ b/api/logic/minecraft/launch/ModMinecraftJar.cpp
@@ -19,7 +19,7 @@
 #include "minecraft/OpSys.h"
 #include "FileSystem.h"
 #include "minecraft/MinecraftInstance.h"
-#include "minecraft/ComponentList.h"
+#include "minecraft/PackProfile.h"
 
 void ModMinecraftJar::executeTask()
 {
@@ -43,7 +43,7 @@ void ModMinecraftJar::executeTask()
     }
 
     // create temporary modded jar, if needed
-    auto components = m_inst->getComponentList();
+    auto components = m_inst->getPackProfile();
     auto profile = components->getProfile();
     auto jarMods = m_inst->getJarMods();
     if(jarMods.size())
diff --git a/api/logic/minecraft/launch/ReconstructAssets.cpp b/api/logic/minecraft/launch/ReconstructAssets.cpp
index af9af127..3ac320bd 100644
--- a/api/logic/minecraft/launch/ReconstructAssets.cpp
+++ b/api/logic/minecraft/launch/ReconstructAssets.cpp
@@ -15,7 +15,7 @@
 
 #include "ReconstructAssets.h"
 #include "minecraft/MinecraftInstance.h"
-#include "minecraft/ComponentList.h"
+#include "minecraft/PackProfile.h"
 #include "minecraft/AssetsUtils.h"
 #include "launch/LaunchTask.h"
 
@@ -23,7 +23,7 @@ void ReconstructAssets::executeTask()
 {
     auto instance = m_parent->instance();
     std::shared_ptr<MinecraftInstance> minecraftInstance = std::dynamic_pointer_cast<MinecraftInstance>(instance);
-    auto components = minecraftInstance->getComponentList();
+    auto components = minecraftInstance->getPackProfile();
     auto profile = components->getProfile();
     auto assets = profile->getMinecraftAssets();
 
diff --git a/api/logic/minecraft/legacy/LegacyUpgradeTask.cpp b/api/logic/minecraft/legacy/LegacyUpgradeTask.cpp
index 9d86a7b5..a4ea60cd 100644
--- a/api/logic/minecraft/legacy/LegacyUpgradeTask.cpp
+++ b/api/logic/minecraft/legacy/LegacyUpgradeTask.cpp
@@ -6,7 +6,7 @@
 #include <QtConcurrentRun>
 #include "LegacyInstance.h"
 #include "minecraft/MinecraftInstance.h"
-#include "minecraft/ComponentList.h"
+#include "minecraft/PackProfile.h"
 #include "LegacyModList.h"
 #include "classparser.h"
 
@@ -84,7 +84,7 @@ void LegacyUpgradeTask::copyFinished()
                 }
             }
         }
-        auto components = inst.getComponentList();
+        auto components = inst.getPackProfile();
         components->buildingFromScratch();
         components->setComponentVersion("net.minecraft", preferredVersionNumber, true);
 
diff --git a/api/logic/minecraft/update/AssetUpdateTask.cpp b/api/logic/minecraft/update/AssetUpdateTask.cpp
index 051b1279..e26ab4ef 100644
--- a/api/logic/minecraft/update/AssetUpdateTask.cpp
+++ b/api/logic/minecraft/update/AssetUpdateTask.cpp
@@ -1,7 +1,7 @@
 #include "Env.h"
 #include "AssetUpdateTask.h"
 #include "minecraft/MinecraftInstance.h"
-#include "minecraft/ComponentList.h"
+#include "minecraft/PackProfile.h"
 #include "net/ChecksumValidator.h"
 #include "minecraft/AssetsUtils.h"
 
@@ -17,7 +17,7 @@ AssetUpdateTask::~AssetUpdateTask()
 void AssetUpdateTask::executeTask()
 {
     setStatus(tr("Updating assets index..."));
-    auto components = m_inst->getComponentList();
+    auto components = m_inst->getPackProfile();
     auto profile = components->getProfile();
     auto assets = profile->getMinecraftAssets();
     QUrl indexUrl = assets->url;
@@ -54,7 +54,7 @@ void AssetUpdateTask::assetIndexFinished()
     AssetsIndex index;
     qDebug() << m_inst->name() << ": Finished asset index download";
 
-    auto components = m_inst->getComponentList();
+    auto components = m_inst->getPackProfile();
     auto profile = components->getProfile();
     auto assets = profile->getMinecraftAssets();
 
diff --git a/api/logic/minecraft/update/FMLLibrariesTask.cpp b/api/logic/minecraft/update/FMLLibrariesTask.cpp
index 52a8375b..85993e81 100644
--- a/api/logic/minecraft/update/FMLLibrariesTask.cpp
+++ b/api/logic/minecraft/update/FMLLibrariesTask.cpp
@@ -3,7 +3,8 @@
 #include <minecraft/VersionFilterData.h>
 #include "FMLLibrariesTask.h"
 #include "minecraft/MinecraftInstance.h"
-#include "minecraft/ComponentList.h"
+#include "minecraft/PackProfile.h"
+#include "BuildConfig.h"
 
 FMLLibrariesTask::FMLLibrariesTask(MinecraftInstance * inst)
 {
@@ -13,7 +14,7 @@ void FMLLibrariesTask::executeTask()
 {
     // Get the mod list
     MinecraftInstance *inst = (MinecraftInstance *)m_inst;
-    auto components = inst->getComponentList();
+    auto components = inst->getPackProfile();
     auto profile = components->getProfile();
 
     if (!profile->hasTrait("legacyFML"))
@@ -63,7 +64,7 @@ void FMLLibrariesTask::executeTask()
     for (auto &lib : fmlLibsToProcess)
     {
         auto entry = metacache->resolveEntry("fmllibs", lib.filename);
-        QString urlString = (lib.ours ? URLConstants::FMLLIBS_OUR_BASE_URL : URLConstants::FMLLIBS_FORGE_BASE_URL) + lib.filename;
+        QString urlString = (lib.ours ? BuildConfig.FMLLIBS_OUR_BASE_URL : BuildConfig.FMLLIBS_FORGE_BASE_URL) + lib.filename;
         dljob->addNetAction(Net::Download::makeCached(QUrl(urlString), entry));
     }
 
diff --git a/api/logic/minecraft/update/LibrariesTask.cpp b/api/logic/minecraft/update/LibrariesTask.cpp
index a000f77f..7f66a651 100644
--- a/api/logic/minecraft/update/LibrariesTask.cpp
+++ b/api/logic/minecraft/update/LibrariesTask.cpp
@@ -1,7 +1,7 @@
 #include "Env.h"
 #include "LibrariesTask.h"
 #include "minecraft/MinecraftInstance.h"
-#include "minecraft/ComponentList.h"
+#include "minecraft/PackProfile.h"
 
 LibrariesTask::LibrariesTask(MinecraftInstance * inst)
 {
@@ -15,7 +15,7 @@ void LibrariesTask::executeTask()
     MinecraftInstance *inst = (MinecraftInstance *)m_inst;
 
     // Build a list of URLs that will need to be downloaded.
-    auto components = inst->getComponentList();
+    auto components = inst->getPackProfile();
     auto profile = components->getProfile();
 
     auto job = new NetJob(tr("Libraries for instance %1").arg(inst->name()));
diff --git a/api/logic/modplatform/legacy_ftb/PackFetchTask.cpp b/api/logic/modplatform/legacy_ftb/PackFetchTask.cpp
index 43c1e6f8..c2ef6436 100644
--- a/api/logic/modplatform/legacy_ftb/PackFetchTask.cpp
+++ b/api/logic/modplatform/legacy_ftb/PackFetchTask.cpp
@@ -2,7 +2,7 @@
 #include "PrivatePackManager.h"
 
 #include <QDomDocument>
-#include "net/URLConstants.h"
+#include <BuildConfig.h>
 
 namespace LegacyFTB {
 
@@ -13,11 +13,11 @@ void PackFetchTask::fetch()
 
     NetJob *netJob = new NetJob("LegacyFTB::ModpackFetch");
 
-    QUrl publicPacksUrl = QUrl(URLConstants::LEGACY_FTB_CDN_BASE_URL + "static/modpacks.xml");
+    QUrl publicPacksUrl = QUrl(BuildConfig.LEGACY_FTB_CDN_BASE_URL + "static/modpacks.xml");
     qDebug() << "Downloading public version info from" << publicPacksUrl.toString();
     netJob->addNetAction(Net::Download::makeByteArray(publicPacksUrl, &publicModpacksXmlFileData));
 
-    QUrl thirdPartyUrl = QUrl(URLConstants::LEGACY_FTB_CDN_BASE_URL + "static/thirdparty.xml");
+    QUrl thirdPartyUrl = QUrl(BuildConfig.LEGACY_FTB_CDN_BASE_URL + "static/thirdparty.xml");
     qDebug() << "Downloading thirdparty version info from" << thirdPartyUrl.toString();
     netJob->addNetAction(Net::Download::makeByteArray(thirdPartyUrl, &thirdPartyModpacksXmlFileData));
 
@@ -30,7 +30,7 @@ void PackFetchTask::fetch()
 
 void PackFetchTask::fetchPrivate(const QStringList & toFetch)
 {
-    QString privatePackBaseUrl = URLConstants::LEGACY_FTB_CDN_BASE_URL + "static/%1.xml";
+    QString privatePackBaseUrl = BuildConfig.LEGACY_FTB_CDN_BASE_URL + "static/%1.xml";
 
     for (auto &packCode: toFetch)
     {
diff --git a/api/logic/modplatform/legacy_ftb/PackInstallTask.cpp b/api/logic/modplatform/legacy_ftb/PackInstallTask.cpp
index ea7e2c0c..9bf6c76a 100644
--- a/api/logic/modplatform/legacy_ftb/PackInstallTask.cpp
+++ b/api/logic/modplatform/legacy_ftb/PackInstallTask.cpp
@@ -7,9 +7,9 @@
 #include "FileSystem.h"
 #include "settings/INISettingsObject.h"
 #include "minecraft/MinecraftInstance.h"
-#include "minecraft/ComponentList.h"
+#include "minecraft/PackProfile.h"
 #include "minecraft/GradleSpecifier.h"
-#include "net/URLConstants.h"
+#include "BuildConfig.h"
 
 #include <QtConcurrent>
 
@@ -38,11 +38,11 @@ void PackInstallTask::downloadPack()
     QString url;
     if(m_pack.type == PackType::Private)
     {
-        url = QString(URLConstants::LEGACY_FTB_CDN_BASE_URL + "privatepacks/%1").arg(packoffset);
+        url = QString(BuildConfig.LEGACY_FTB_CDN_BASE_URL + "privatepacks/%1").arg(packoffset);
     }
     else
     {
-        url = QString(URLConstants::LEGACY_FTB_CDN_BASE_URL + "modpacks/%1").arg(packoffset);
+        url = QString(BuildConfig.LEGACY_FTB_CDN_BASE_URL + "modpacks/%1").arg(packoffset);
     }
     job->addNetAction(Net::Download::makeCached(url, entry));
     archivePath = entry->getFullPath();
@@ -125,7 +125,7 @@ void PackInstallTask::install()
     instanceSettings->set("InstanceType", "OneSix");
 
     MinecraftInstance instance(m_globalSettings, instanceSettings, m_stagingPath);
-    auto components = instance.getComponentList();
+    auto components = instance.getPackProfile();
     components->buildingFromScratch();
     components->setComponentVersion("net.minecraft", m_pack.mcVersion, true);
 
@@ -210,4 +210,4 @@ bool PackInstallTask::abort()
     return false;
 }
 
-}
\ No newline at end of file
+}
diff --git a/api/logic/net/URLConstants.cpp b/api/logic/net/URLConstants.cpp
deleted file mode 100644
index 9a4d920b..00000000
--- a/api/logic/net/URLConstants.cpp
+++ /dev/null
@@ -1,16 +0,0 @@
-#include "URLConstants.h"
-
-namespace URLConstants {
-
-QString getLegacyJarUrl(QString version)
-{
-    return AWS_DOWNLOAD_VERSIONS + getJarPath(version);
-}
-
-QString getJarPath(QString version)
-{
-    return version + "/" + version + ".jar";
-}
-
-
-}
diff --git a/api/logic/net/URLConstants.h b/api/logic/net/URLConstants.h
deleted file mode 100644
index ebc495bb..00000000
--- a/api/logic/net/URLConstants.h
+++ /dev/null
@@ -1,37 +0,0 @@
-/* Copyright 2013-2019 MultiMC Contributors
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#pragma once
-
-#include <QString>
-
-namespace URLConstants
-{
-const QString AWS_DOWNLOAD_VERSIONS("https://s3.amazonaws.com/Minecraft.Download/versions/");
-const QString RESOURCE_BASE("https://resources.download.minecraft.net/");
-const QString LIBRARY_BASE("https://libraries.minecraft.net/");
-const QString SKINS_BASE("https://crafatar.com/skins/");
-const QString AUTH_BASE("https://authserver.mojang.com/");
-const QString MOJANG_STATUS_URL("https://status.mojang.com/check");
-const QString IMGUR_BASE_URL("https://api.imgur.com/3/");
-const QString FMLLIBS_OUR_BASE_URL("https://files.multimc.org/fmllibs/");
-const QString FMLLIBS_FORGE_BASE_URL("https://files.minecraftforge.net/fmllibs/");
-const QString TRANSLATIONS_BASE_URL("https://files.multimc.org/translations/");
-
-const QString LEGACY_FTB_CDN_BASE_URL("https://dist.creeper.host/FTB2/");
-
-QString getJarPath(QString version);
-QString getLegacyJarUrl(QString version);
-}
diff --git a/api/logic/screenshots/ImgurAlbumCreation.cpp b/api/logic/screenshots/ImgurAlbumCreation.cpp
index 3d32f597..ff9ec6fd 100644
--- a/api/logic/screenshots/ImgurAlbumCreation.cpp
+++ b/api/logic/screenshots/ImgurAlbumCreation.cpp
@@ -6,13 +6,13 @@
 #include <QUrl>
 #include <QStringList>
 
-#include "net/URLConstants.h"
+#include "BuildConfig.h"
 #include "Env.h"
 #include <QDebug>
 
 ImgurAlbumCreation::ImgurAlbumCreation(QList<ScreenshotPtr> screenshots) : NetAction(), m_screenshots(screenshots)
 {
-    m_url = URLConstants::IMGUR_BASE_URL + "album.json";
+    m_url = BuildConfig.IMGUR_BASE_URL + "album.json";
     m_status = Job_NotStarted;
 }
 
diff --git a/api/logic/screenshots/ImgurUpload.cpp b/api/logic/screenshots/ImgurUpload.cpp
index 74165869..1585b061 100644
--- a/api/logic/screenshots/ImgurUpload.cpp
+++ b/api/logic/screenshots/ImgurUpload.cpp
@@ -8,13 +8,13 @@
 #include <QFile>
 #include <QUrl>
 
-#include "net/URLConstants.h"
+#include "BuildConfig.h"
 #include "Env.h"
 #include <QDebug>
 
 ImgurUpload::ImgurUpload(ScreenshotPtr shot) : NetAction(), m_shot(shot)
 {
-    m_url = URLConstants::IMGUR_BASE_URL + "upload.json";
+    m_url = BuildConfig.IMGUR_BASE_URL + "upload.json";
     m_status = Job_NotStarted;
 }
 
diff --git a/api/logic/status/StatusChecker.cpp b/api/logic/status/StatusChecker.cpp
index f18ed364..2a4091c6 100644
--- a/api/logic/status/StatusChecker.cpp
+++ b/api/logic/status/StatusChecker.cpp
@@ -15,12 +15,12 @@
 
 #include "StatusChecker.h"
 
-#include <net/URLConstants.h>
-
 #include <QByteArray>
 
 #include <QDebug>
 
+#include <BuildConfig.h>
+
 StatusChecker::StatusChecker()
 {
 
@@ -43,7 +43,7 @@ void StatusChecker::reloadStatus()
     // qDebug() << "Reloading status.";
 
     NetJob* job = new NetJob("Status JSON");
-    job->addNetAction(Net::Download::makeByteArray(URLConstants::MOJANG_STATUS_URL, &dataSink));
+    job->addNetAction(Net::Download::makeByteArray(BuildConfig.MOJANG_STATUS_URL, &dataSink));
     QObject::connect(job, &NetJob::succeeded, this, &StatusChecker::statusDownloadFinished);
     QObject::connect(job, &NetJob::failed, this, &StatusChecker::statusDownloadFailed);
     m_statusNetJob.reset(job);
diff --git a/api/logic/translations/TranslationsModel.cpp b/api/logic/translations/TranslationsModel.cpp
index a5a4fb15..adb3fa98 100644
--- a/api/logic/translations/TranslationsModel.cpp
+++ b/api/logic/translations/TranslationsModel.cpp
@@ -10,7 +10,7 @@
 #include <net/NetJob.h>
 #include <net/ChecksumValidator.h>
 #include <Env.h>
-#include <net/URLConstants.h>
+#include <BuildConfig.h>
 #include "Json.h"
 
 #include "POTranslator.h"
@@ -184,7 +184,8 @@ void readIndex(const QString & path, QMap<QString, Language>& languages)
     int index = 1;
     try
     {
-        auto doc = Json::requireObject(Json::requireDocument(data));
+        auto toplevel_doc = Json::requireDocument(data);
+        auto doc = Json::requireObject(toplevel_doc);
         auto file_type = Json::requireString(doc, "file_type");
         if(file_type != "MMC-TRANSLATION-INDEX")
         {
@@ -605,7 +606,7 @@ void TranslationsModel::downloadTranslation(QString key)
     MetaEntryPtr entry = ENV.metacache()->resolveEntry("translations", "mmc_" + key + ".qm");
     entry->setStale(true);
 
-    auto dl = Net::Download::makeCached(QUrl(URLConstants::TRANSLATIONS_BASE_URL + lang->file_name), entry);
+    auto dl = Net::Download::makeCached(QUrl(BuildConfig.TRANSLATIONS_BASE_URL + lang->file_name), entry);
     auto rawHash = QByteArray::fromHex(lang->file_sha1.toLatin1());
     dl->addValidator(new Net::ChecksumValidator(QCryptographicHash::Sha1, rawHash));
     dl->m_total_progress = lang->file_size;
diff --git a/application/CMakeLists.txt b/application/CMakeLists.txt
index 53c21866..1d5b8e04 100644
--- a/application/CMakeLists.txt
+++ b/application/CMakeLists.txt
@@ -1,8 +1,5 @@
 project(application)
 
-######## Configure the file with build properties ########
-configure_file("${PROJECT_SOURCE_DIR}/BuildConfig.cpp.in" "${PROJECT_BINARY_DIR}/BuildConfig.cpp")
-
 ################################ FILES ################################
 
 ######## Sources and headers ########
@@ -11,8 +8,6 @@ SET(MULTIMC_SOURCES
     main.cpp
     MultiMC.h
     MultiMC.cpp
-    BuildConfig.h
-    ${PROJECT_BINARY_DIR}/BuildConfig.cpp
     UpdateController.cpp
     UpdateController.h
 
diff --git a/application/MainWindow.cpp b/application/MainWindow.cpp
index 48b9ed47..00c37084 100644
--- a/application/MainWindow.cpp
+++ b/application/MainWindow.cpp
@@ -56,7 +56,7 @@
 #include <launch/LaunchTask.h>
 #include <minecraft/auth/MojangAccountList.h>
 #include <SkinUtils.h>
-#include <net/URLConstants.h>
+#include <BuildConfig.h>
 #include <net/NetJob.h>
 #include <net/Download.h>
 #include <news/NewsChecker.h>
@@ -772,7 +772,7 @@ MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent), ui(new MainWindow
         for (auto profile : account->profiles())
         {
             auto meta = Env::getInstance().metacache()->resolveEntry("skins", profile.id + ".png");
-            auto action = Net::Download::makeCached(QUrl(URLConstants::SKINS_BASE + profile.id + ".png"), meta);
+            auto action = Net::Download::makeCached(QUrl(BuildConfig.SKINS_BASE + profile.id + ".png"), meta);
             skin_dls.append(action);
             meta->setStale(true);
         }
diff --git a/application/MultiMC.cpp b/application/MultiMC.cpp
index a8d26498..eeab500e 100644
--- a/application/MultiMC.cpp
+++ b/application/MultiMC.cpp
@@ -45,7 +45,6 @@
 #include <minecraft/auth/MojangAccountList.h>
 #include "icons/IconList.h"
 #include "net/HttpMetaCache.h"
-#include "net/URLConstants.h"
 #include "Env.h"
 
 #include "java/JavaUtils.h"
diff --git a/application/pages/global/AccountListPage.cpp b/application/pages/global/AccountListPage.cpp
index 0453ae00..3c900fab 100644
--- a/application/pages/global/AccountListPage.cpp
+++ b/application/pages/global/AccountListPage.cpp
@@ -22,7 +22,6 @@
 #include <QDebug>
 
 #include "net/NetJob.h"
-#include "net/URLConstants.h"
 #include "Env.h"
 
 #include "dialogs/ProgressDialog.h"
@@ -34,6 +33,8 @@
 
 #include "MultiMC.h"
 
+#include "BuildConfig.h"
+
 AccountListPage::AccountListPage(QWidget *parent)
     : QMainWindow(parent), ui(new Ui::AccountListPage)
 {
@@ -170,7 +171,7 @@ void AccountListPage::addAccount(const QString &errMsg)
         for (AccountProfile profile : account->profiles())
         {
             auto meta = Env::getInstance().metacache()->resolveEntry("skins", profile.id + ".png");
-            auto action = Net::Download::makeCached(QUrl(URLConstants::SKINS_BASE + profile.id + ".png"), meta);
+            auto action = Net::Download::makeCached(QUrl(BuildConfig.SKINS_BASE + profile.id + ".png"), meta);
             job->addNetAction(action);
             meta->setStale(true);
         }
diff --git a/application/pages/instance/ModFolderPage.cpp b/application/pages/instance/ModFolderPage.cpp
index ec4bf3c9..2981ea13 100644
--- a/application/pages/instance/ModFolderPage.cpp
+++ b/application/pages/instance/ModFolderPage.cpp
@@ -28,7 +28,7 @@
 #include "minecraft/mod/ModFolderModel.h"
 #include "minecraft/mod/Mod.h"
 #include "minecraft/VersionFilterData.h"
-#include "minecraft/ComponentList.h"
+#include "minecraft/PackProfile.h"
 #include <DesktopServices.h>
 
 #include <QSortFilterProxyModel>
@@ -244,7 +244,7 @@ bool CoreModFolderPage::shouldDisplay() const
         auto inst = dynamic_cast<MinecraftInstance *>(m_inst);
         if (!inst)
             return true;
-        auto version = inst->getComponentList();
+        auto version = inst->getPackProfile();
         if (!version)
             return true;
         if(!version->getComponent("net.minecraftforge"))
diff --git a/application/pages/instance/VersionPage.cpp b/application/pages/instance/VersionPage.cpp
index c7a8dc30..f2d19f25 100644
--- a/application/pages/instance/VersionPage.cpp
+++ b/application/pages/instance/VersionPage.cpp
@@ -37,7 +37,7 @@
 #include <QString>
 #include <QUrl>
 
-#include "minecraft/ComponentList.h"
+#include "minecraft/PackProfile.h"
 #include "minecraft/auth/MojangAccountList.h"
 #include "minecraft/mod/Mod.h"
 #include "icons/IconList.h"
@@ -114,9 +114,9 @@ VersionPage::VersionPage(MinecraftInstance *inst, QWidget *parent)
 
     ui->toolBar->insertSpacer(ui->actionReload);
 
-    m_profile = m_inst->getComponentList();
+    m_profile = m_inst->getPackProfile();
 
-    reloadComponentList();
+    reloadPackProfile();
 
     auto proxy = new IconProxy(ui->packageView);
     proxy->setSourceModel(m_profile.get());
@@ -129,7 +129,7 @@ VersionPage::VersionPage(MinecraftInstance *inst, QWidget *parent)
     auto smodel = ui->packageView->selectionModel();
     connect(smodel, &QItemSelectionModel::currentChanged, this, &VersionPage::packageCurrent);
 
-    connect(m_profile.get(), &ComponentList::minecraftChanged, this, &VersionPage::updateVersionControls);
+    connect(m_profile.get(), &PackProfile::minecraftChanged, this, &VersionPage::updateVersionControls);
     controlsEnabled = !m_inst->isRunning();
     updateVersionControls();
     preselect(0);
@@ -232,7 +232,7 @@ void VersionPage::updateButtons(int row)
     ui->actionAdd_to_Minecraft_jar->setEnabled(controlsEnabled);
 }
 
-bool VersionPage::reloadComponentList()
+bool VersionPage::reloadPackProfile()
 {
     try
     {
@@ -255,7 +255,7 @@ bool VersionPage::reloadComponentList()
 
 void VersionPage::on_actionReload_triggered()
 {
-    reloadComponentList();
+    reloadPackProfile();
     m_container->refreshContainer();
 }
 
@@ -270,7 +270,7 @@ void VersionPage::on_actionRemove_triggered()
         }
     }
     updateButtons();
-    reloadComponentList();
+    reloadPackProfile();
     m_container->refreshContainer();
 }
 
@@ -306,7 +306,7 @@ void VersionPage::on_actionMove_up_triggered()
 {
     try
     {
-        m_profile->move(currentRow(), ComponentList::MoveUp);
+        m_profile->move(currentRow(), PackProfile::MoveUp);
     }
     catch (const Exception &e)
     {
@@ -319,7 +319,7 @@ void VersionPage::on_actionMove_down_triggered()
 {
     try
     {
-        m_profile->move(currentRow(), ComponentList::MoveDown);
+        m_profile->move(currentRow(), PackProfile::MoveDown);
     }
     catch (const Exception &e)
     {
@@ -357,8 +357,8 @@ void VersionPage::on_actionChange_version_triggered()
     VersionSelectDialog vselect(list.get(), tr("Change %1 version").arg(name), this);
     if (uid == "net.fabricmc.intermediary")
     {
-        vselect.setEmptyString(tr("No Fabric Loader versions are currently available."));
-        vselect.setEmptyErrorString(tr("Couldn't load or download the Fabric Loader version lists!"));
+        vselect.setEmptyString(tr("No intermediary mappings versions are currently available."));
+        vselect.setEmptyErrorString(tr("Couldn't load or download the intermediary mappings version lists!"));
         vselect.setExactFilter(BaseVersionList::ParentVersionRole, m_profile->getComponentVersion("net.minecraft"));
     }
     auto currentVersion = patch->getVersion();
diff --git a/application/pages/instance/VersionPage.h b/application/pages/instance/VersionPage.h
index 769fe997..c95a0084 100644
--- a/application/pages/instance/VersionPage.h
+++ b/application/pages/instance/VersionPage.h
@@ -18,7 +18,7 @@
 #include <QMainWindow>
 
 #include "minecraft/MinecraftInstance.h"
-#include "minecraft/ComponentList.h"
+#include "minecraft/PackProfile.h"
 #include "pages/BasePage.h"
 
 namespace Ui
@@ -82,11 +82,11 @@ protected:
     QMenu * createPopupMenu() override;
 
     /// FIXME: this shouldn't be necessary!
-    bool reloadComponentList();
+    bool reloadPackProfile();
 
 private:
     Ui::VersionPage *ui;
-    std::shared_ptr<ComponentList> m_profile;
+    std::shared_ptr<PackProfile> m_profile;
     MinecraftInstance *m_inst;
     int currentIdx = 0;
     bool controlsEnabled = false;
diff --git a/application/pages/modplatform/legacy_ftb/ListModel.cpp b/application/pages/modplatform/legacy_ftb/ListModel.cpp
index 105db25a..32596fb3 100644
--- a/application/pages/modplatform/legacy_ftb/ListModel.cpp
+++ b/application/pages/modplatform/legacy_ftb/ListModel.cpp
@@ -10,7 +10,7 @@
 #include <RWStorage.h>
 #include <Env.h>
 
-#include "net/URLConstants.h"
+#include <BuildConfig.h>
 
 namespace LegacyFTB {
 
@@ -218,7 +218,7 @@ void ListModel::requestLogo(QString file)
 
     MetaEntryPtr entry = ENV.metacache()->resolveEntry("FTBPacks", QString("logos/%1").arg(file.section(".", 0, 0)));
     NetJob *job = new NetJob(QString("FTB Icon Download for %1").arg(file));
-    job->addNetAction(Net::Download::makeCached(QUrl(QString(URLConstants::LEGACY_FTB_CDN_BASE_URL + "static/%1").arg(file)), entry));
+    job->addNetAction(Net::Download::makeCached(QUrl(QString(BuildConfig.LEGACY_FTB_CDN_BASE_URL + "static/%1").arg(file)), entry));
 
     auto fullPath = entry->getFullPath();
     QObject::connect(job, &NetJob::finished, this, [this, file, fullPath]
diff --git a/application/pages/modplatform/twitch/TwitchModel.cpp b/application/pages/modplatform/twitch/TwitchModel.cpp
index d9358941..9e3c3ad2 100644
--- a/application/pages/modplatform/twitch/TwitchModel.cpp
+++ b/application/pages/modplatform/twitch/TwitchModel.cpp
@@ -10,8 +10,6 @@
 #include <RWStorage.h>
 #include <Env.h>
 
-#include "net/URLConstants.h"
-
 namespace Twitch {
 
 ListModel::ListModel(QObject *parent) : QAbstractListModel(parent)
diff --git a/application/pages/modplatform/twitch/TwitchPage.ui b/application/pages/modplatform/twitch/TwitchPage.ui
index 29bdc727..c78d8ce0 100644
--- a/application/pages/modplatform/twitch/TwitchPage.ui
+++ b/application/pages/modplatform/twitch/TwitchPage.ui
@@ -21,37 +21,6 @@
      </property>
     </widget>
    </item>
-   <item row="1" column="0" colspan="2">
-    <widget class="QTreeView" name="packView">
-     <property name="horizontalScrollBarPolicy">
-      <enum>Qt::ScrollBarAlwaysOff</enum>
-     </property>
-     <property name="alternatingRowColors">
-      <bool>true</bool>
-     </property>
-     <property name="iconSize">
-      <size>
-       <width>48</width>
-       <height>48</height>
-      </size>
-     </property>
-     <property name="rootIsDecorated">
-      <bool>false</bool>
-     </property>
-     <property name="uniformRowHeights">
-      <bool>true</bool>
-     </property>
-     <property name="itemsExpandable">
-      <bool>false</bool>
-     </property>
-     <property name="allColumnsShowFocus">
-      <bool>true</bool>
-     </property>
-     <attribute name="headerVisible">
-      <bool>false</bool>
-     </attribute>
-    </widget>
-   </item>
    <item row="2" column="0" colspan="2">
     <widget class="MCModInfoFrame" name="frame">
      <property name="sizePolicy">
@@ -68,6 +37,22 @@
      </property>
     </widget>
    </item>
+   <item row="1" column="0" colspan="2">
+    <widget class="QListView" name="packView">
+     <property name="horizontalScrollBarPolicy">
+      <enum>Qt::ScrollBarAlwaysOff</enum>
+     </property>
+     <property name="alternatingRowColors">
+      <bool>true</bool>
+     </property>
+     <property name="iconSize">
+      <size>
+       <width>48</width>
+       <height>48</height>
+      </size>
+     </property>
+    </widget>
+   </item>
   </layout>
  </widget>
  <customwidgets>
diff --git a/application/BuildConfig.cpp.in b/buildconfig/BuildConfig.cpp.in
similarity index 96%
rename from application/BuildConfig.cpp.in
rename to buildconfig/BuildConfig.cpp.in
index a1d236b2..86ea83ee 100644
--- a/application/BuildConfig.cpp.in
+++ b/buildconfig/BuildConfig.cpp.in
@@ -1,7 +1,7 @@
 #include "BuildConfig.h"
 #include <QObject>
 
-Config BuildConfig;
+const Config BuildConfig;
 
 Config::Config()
 {
@@ -33,6 +33,7 @@ Config::Config()
     VERSION_STR = "@MultiMC_VERSION_STRING@";
     NEWS_RSS_URL = "@MultiMC_NEWS_RSS_URL@";
     PASTE_EE_KEY = "@MultiMC_PASTE_EE_API_KEY@";
+    META_URL = "@MultiMC_META_URL@";
 }
 
 QString Config::printableVersionString() const
diff --git a/application/BuildConfig.h b/buildconfig/BuildConfig.h
similarity index 67%
rename from application/BuildConfig.h
rename to buildconfig/BuildConfig.h
index 77c42dd4..a80af3d2 100644
--- a/application/BuildConfig.h
+++ b/buildconfig/BuildConfig.h
@@ -60,6 +60,23 @@ public:
      */
     QString PASTE_EE_KEY;
 
+    /**
+     * MultiMC Metadata repository URL prefix
+     */
+    QString META_URL;
+
+    QString RESOURCE_BASE = "https://resources.download.minecraft.net/";
+    QString LIBRARY_BASE = "https://libraries.minecraft.net/";
+    QString SKINS_BASE = "https://crafatar.com/skins/";
+    QString AUTH_BASE = "https://authserver.mojang.com/";
+    QString MOJANG_STATUS_URL = "https://status.mojang.com/check";
+    QString IMGUR_BASE_URL = "https://api.imgur.com/3/";
+    QString FMLLIBS_OUR_BASE_URL = "https://files.multimc.org/fmllibs/";
+    QString FMLLIBS_FORGE_BASE_URL = "https://files.minecraftforge.net/fmllibs/";
+    QString TRANSLATIONS_BASE_URL = "https://files.multimc.org/translations/";
+
+    QString LEGACY_FTB_CDN_BASE_URL = "https://dist.creeper.host/FTB2/";
+
     /**
      * \brief Converts the Version to a string.
      * \return The version number in string format (major.minor.revision.build).
@@ -67,4 +84,4 @@ public:
     QString printableVersionString() const;
 };
 
-extern Config BuildConfig;
+extern const Config BuildConfig;
diff --git a/buildconfig/CMakeLists.txt b/buildconfig/CMakeLists.txt
new file mode 100644
index 00000000..de4fd350
--- /dev/null
+++ b/buildconfig/CMakeLists.txt
@@ -0,0 +1,11 @@
+######## Configure the file with build properties ########
+
+configure_file("${CMAKE_CURRENT_SOURCE_DIR}/BuildConfig.cpp.in" "${CMAKE_CURRENT_BINARY_DIR}/BuildConfig.cpp")
+
+add_library(BuildConfig STATIC
+    BuildConfig.h
+    ${CMAKE_CURRENT_BINARY_DIR}/BuildConfig.cpp
+)
+
+target_link_libraries(BuildConfig Qt5::Core)
+target_include_directories(BuildConfig PUBLIC "${CMAKE_CURRENT_SOURCE_DIR}")
diff --git a/libraries/libnbtplusplus b/libraries/libnbtplusplus
index 92f8d572..dc72a20b 160000
--- a/libraries/libnbtplusplus
+++ b/libraries/libnbtplusplus
@@ -1 +1 @@
-Subproject commit 92f8d57227feb94643378ecf595626c60c0f59b8
+Subproject commit dc72a20b7efd304d12af2025223fad07b4b78464