5 files changed, 34 insertions, 7 deletions
diff --git a/launcher/Application.cpp b/launcher/Application.cpp
index e94e96a9..b85729f0 100644
--- a/launcher/Application.cpp
+++ b/launcher/Application.cpp
@@ -488,7 +488,8 @@ Application::Application(int &argc, char **argv) : QApplication(argc, argv)
 
     // Initialize application settings
     {
-        m_settings.reset(new INISettingsObject(BuildConfig.LAUNCHER_CONFIGFILE, this));
+        // Provide a fallback for migration from PolyMC
+        m_settings.reset(new INISettingsObject({ BuildConfig.LAUNCHER_CONFIGFILE, "polymc.cfg" }, this));
         // Updates
         // Multiple channels are separated by spaces
         m_settings->registerSetting("UpdateChannel", BuildConfig.VERSION_CHANNEL);
diff --git a/launcher/settings/INISettingsObject.cpp b/launcher/settings/INISettingsObject.cpp
index 12513403..da962ee9 100644
--- a/launcher/settings/INISettingsObject.cpp
+++ b/launcher/settings/INISettingsObject.cpp
@@ -16,7 +16,30 @@
 #include "INISettingsObject.h"
 #include "Setting.h"
 
-INISettingsObject::INISettingsObject(const QString &path, QObject *parent)
+#include <QDebug>
+#include <QFile>
+
+INISettingsObject::INISettingsObject(QStringList paths, QObject *parent)
+    : SettingsObject(parent)
+{
+    auto first_path = paths.constFirst();
+    for (auto path : paths) {
+        if (!QFile::exists(path))
+            continue;
+
+        if (path != first_path && QFile::exists(path)) {
+            // Copy the fallback to the preferred path.
+            QFile::copy(path, first_path);
+            qDebug() << "Copied settings from" << path << "to" << first_path;
+            break;
+        }
+    }
+
+    m_filePath = first_path;
+    m_ini.loadFile(first_path);
+}
+
+INISettingsObject::INISettingsObject(QString path, QObject* parent)
     : SettingsObject(parent)
 {
     m_filePath = path;
diff --git a/launcher/settings/INISettingsObject.h b/launcher/settings/INISettingsObject.h
index 26cc32e5..d2f448a9 100644
--- a/launcher/settings/INISettingsObject.h
+++ b/launcher/settings/INISettingsObject.h
@@ -28,7 +28,10 @@ class INISettingsObject : public SettingsObject
 {
     Q_OBJECT
 public:
-    explicit INISettingsObject(const QString &path, QObject *parent = 0);
+    /** 'paths' is a list of INI files to try, in order, for fallback support. */
+    explicit INISettingsObject(QStringList paths, QObject* parent = nullptr);
+
+    explicit INISettingsObject(QString path, QObject*  parent = nullptr);
 
     /*!
      * \brief Gets the path to the INI file.
diff --git a/launcher/ui/pages/instance/ExternalResourcesPage.cpp b/launcher/ui/pages/instance/ExternalResourcesPage.cpp
index f31e8325..b6c873cc 100644
--- a/launcher/ui/pages/instance/ExternalResourcesPage.cpp
+++ b/launcher/ui/pages/instance/ExternalResourcesPage.cpp
@@ -103,10 +103,6 @@ void ExternalResourcesPage::runningStateChanged(bool running)
         return;
     
     m_controlsEnabled = !running;
-    ui->actionAddItem->setEnabled(m_controlsEnabled);
-    ui->actionDisableItem->setEnabled(m_controlsEnabled);
-    ui->actionEnableItem->setEnabled(m_controlsEnabled);
-    ui->actionRemoveItem->setEnabled(m_controlsEnabled);
 }
 
 bool ExternalResourcesPage::shouldDisplay() const
diff --git a/launcher/ui/pages/instance/ModFolderPage.cpp b/launcher/ui/pages/instance/ModFolderPage.cpp
index 28a874c2..f0106066 100644
--- a/launcher/ui/pages/instance/ModFolderPage.cpp
+++ b/launcher/ui/pages/instance/ModFolderPage.cpp
@@ -117,6 +117,10 @@ void ModFolderPage::runningStateChanged(bool running)
     ExternalResourcesPage::runningStateChanged(running);
     ui->actionDownloadItem->setEnabled(!running);
     ui->actionUpdateItem->setEnabled(!running);
+    ui->actionAddItem->setEnabled(!running);
+    ui->actionEnableItem->setEnabled(!running);
+    ui->actionDisableItem->setEnabled(!running);
+    ui->actionRemoveItem->setEnabled(!running);
 }
 
 bool ModFolderPage::shouldDisplay() const