diff --git a/src/frontend/qt_sdl/Config.cpp b/src/frontend/qt_sdl/Config.cpp
index a578266d..aa20a52b 100644
--- a/src/frontend/qt_sdl/Config.cpp
+++ b/src/frontend/qt_sdl/Config.cpp
@@ -62,11 +62,6 @@ int GL_ScaleFactor;
 bool GL_BetterPolygons;
 bool GL_HiresCoordinates;
 
-bool LimitFPS;
-int MaxFPS;
-bool AudioSync;
-bool ShowOSD;
-
 bool FirmwareOverrideSettings;
 std::string FirmwareUsername;
 int FirmwareLanguage;
diff --git a/src/frontend/qt_sdl/Config.h b/src/frontend/qt_sdl/Config.h
index 8f8857a3..f2cc547d 100644
--- a/src/frontend/qt_sdl/Config.h
+++ b/src/frontend/qt_sdl/Config.h
@@ -176,11 +176,6 @@ extern int GL_ScaleFactor;
 extern bool GL_BetterPolygons;
 extern bool GL_HiresCoordinates;
 
-extern bool LimitFPS;
-extern int MaxFPS;
-extern bool AudioSync;
-extern bool ShowOSD;
-
 extern bool FirmwareOverrideSettings;
 extern std::string FirmwareUsername;
 extern int FirmwareLanguage;
diff --git a/src/frontend/qt_sdl/EmuInstance.cpp b/src/frontend/qt_sdl/EmuInstance.cpp
index 1ea5a307..aab8487b 100644
--- a/src/frontend/qt_sdl/EmuInstance.cpp
+++ b/src/frontend/qt_sdl/EmuInstance.cpp
@@ -68,6 +68,10 @@ EmuInstance::EmuInstance(int inst) : instanceID(inst),
 {
     cheatFile = nullptr;
 
+    doLimitFPS = globalCfg.GetBool("LimitFPS");
+    maxFPS = globalCfg.GetInt("MaxFPS");
+    doAudioSync = globalCfg.GetBool("AudioSync");
+
     nds = nullptr;
     updateConsole(nullptr, nullptr);
 
diff --git a/src/frontend/qt_sdl/EmuInstance.h b/src/frontend/qt_sdl/EmuInstance.h
index cbe71569..ff78a0f7 100644
--- a/src/frontend/qt_sdl/EmuInstance.h
+++ b/src/frontend/qt_sdl/EmuInstance.h
@@ -225,6 +225,10 @@ public:
     std::unique_ptr<SaveManager> ndsSave;
     std::unique_ptr<SaveManager> gbaSave;
     std::unique_ptr<SaveManager> firmwareSave;
+
+    bool doLimitFPS;
+    int maxFPS;
+    bool doAudioSync;
 private:
 
     std::unique_ptr<melonDS::Savestate> backupState;
diff --git a/src/frontend/qt_sdl/EmuThread.cpp b/src/frontend/qt_sdl/EmuThread.cpp
index beba17b5..7ff58d6a 100644
--- a/src/frontend/qt_sdl/EmuThread.cpp
+++ b/src/frontend/qt_sdl/EmuThread.cpp
@@ -407,15 +407,15 @@ void EmuThread::run()
                 emuInstance->audioVolume = volumeLevel * (256.0 / 31.0);
             }
 
-            if (Config::AudioSync && !fastforward)
+            if (emuInstance->doAudioSync && !fastforward)
                 emuInstance->audioSync();
 
             double frametimeStep = nlines / (60.0 * 263.0);
 
             {
-                bool limitfps = Config::LimitFPS && !fastforward;
+                bool limitfps = emuInstance->doLimitFPS && !fastforward;
 
-                double practicalFramelimit = limitfps ? frametimeStep : 1.0 / Config::MaxFPS;
+                double practicalFramelimit = limitfps ? frametimeStep : 1.0 / emuInstance->maxFPS;
 
                 double curtime = SDL_GetPerformanceCounter() * perfCountsSec;
 
diff --git a/src/frontend/qt_sdl/InterfaceSettingsDialog.cpp b/src/frontend/qt_sdl/InterfaceSettingsDialog.cpp
index 851e7abf..51d523e2 100644
--- a/src/frontend/qt_sdl/InterfaceSettingsDialog.cpp
+++ b/src/frontend/qt_sdl/InterfaceSettingsDialog.cpp
@@ -31,11 +31,15 @@ InterfaceSettingsDialog::InterfaceSettingsDialog(QWidget* parent) : QDialog(pare
     ui->setupUi(this);
     setAttribute(Qt::WA_DeleteOnClose);
 
+    emuInstance = ((MainWindow*)parent)->getEmuInstance();
+
+    auto& cfg = emuInstance->getGlobalConfig();
+
     ui->cbMouseHide->setChecked(Config::MouseHide != 0);
     ui->spinMouseHideSeconds->setEnabled(Config::MouseHide != 0);
     ui->spinMouseHideSeconds->setValue(Config::MouseHideSeconds);
     ui->cbPauseLostFocus->setChecked(Config::PauseLostFocus != 0);
-    ui->spinMaxFPS->setValue(Config::MaxFPS);
+    ui->spinMaxFPS->setValue(cfg.GetInt("MaxFPS"));
 
     const QList<QString> themeKeys = QStyleFactory::keys();
     const QString currentTheme = qApp->style()->objectName();
@@ -74,11 +78,14 @@ void InterfaceSettingsDialog::done(int r)
         Config::MouseHide = ui->cbMouseHide->isChecked() ? 1:0;
         Config::MouseHideSeconds = ui->spinMouseHideSeconds->value();
         Config::PauseLostFocus = ui->cbPauseLostFocus->isChecked() ? 1:0;
-        Config::MaxFPS = ui->spinMaxFPS->value();
+        emuInstance->maxFPS = ui->spinMaxFPS->value();
 
         QString themeName = ui->cbxUITheme->currentData().toString();
         Config::UITheme = themeName.toStdString();
 
+        auto& cfg = emuInstance->getGlobalConfig();
+        cfg.SetInt("MaxFPS", emuInstance->maxFPS);
+
         Config::Save();
 
         if (!Config::UITheme.empty())
diff --git a/src/frontend/qt_sdl/InterfaceSettingsDialog.h b/src/frontend/qt_sdl/InterfaceSettingsDialog.h
index 5a23b6ea..07e9f73c 100644
--- a/src/frontend/qt_sdl/InterfaceSettingsDialog.h
+++ b/src/frontend/qt_sdl/InterfaceSettingsDialog.h
@@ -24,6 +24,8 @@
 namespace Ui { class InterfaceSettingsDialog; }
 class InterfaceSettingsDialog;
 
+class EmuInstance;
+
 class InterfaceSettingsDialog : public QDialog
 {
     Q_OBJECT
@@ -60,6 +62,8 @@ private slots:
 
 private:
     Ui::InterfaceSettingsDialog* ui;
+
+    EmuInstance* emuInstance;
 };
 
 #endif // INTERFACESETTINGSDIALOG_H
diff --git a/src/frontend/qt_sdl/Window.cpp b/src/frontend/qt_sdl/Window.cpp
index 2dc01255..2c901846 100644
--- a/src/frontend/qt_sdl/Window.cpp
+++ b/src/frontend/qt_sdl/Window.cpp
@@ -231,6 +231,8 @@ MainWindow::MainWindow(int id, EmuInstance* inst, QWidget* parent) :
     oldH = Config::WindowHeight;
     oldMax = Config::WindowMaximized;
 
+    showOSD = windowCfg.GetBool("ShowOSD");
+
     setWindowTitle("melonDS " MELONDS_VERSION);
     setAttribute(Qt::WA_DeleteOnClose);
     setAcceptDrops(true);
@@ -677,10 +679,10 @@ MainWindow::MainWindow(int id, EmuInstance* inst, QWidget* parent) :
     }
 
     actScreenFiltering->setChecked(Config::ScreenFilter);
-    actShowOSD->setChecked(Config::ShowOSD);
+    actShowOSD->setChecked(showOSD);
 
-    actLimitFramerate->setChecked(Config::LimitFPS);
-    actAudioSync->setChecked(Config::AudioSync);
+    actLimitFramerate->setChecked(emuInstance->doLimitFPS);
+    actAudioSync->setChecked(emuInstance->doAudioSync);
 
     if (emuInstance->instanceID > 0)
     {
@@ -757,7 +759,7 @@ void MainWindow::createScreenPanel()
     setCentralWidget(panel);
 
     actScreenFiltering->setEnabled(hasOGL);
-    panel->osdSetEnabled(Config::ShowOSD);
+    panel->osdSetEnabled(showOSD);
 
     connect(this, SIGNAL(screenLayoutChange()), panel, SLOT(onScreenLayoutChanged()));
     emit screenLayoutChange();
@@ -1989,18 +1991,21 @@ void MainWindow::onChangeScreenFiltering(bool checked)
 
 void MainWindow::onChangeShowOSD(bool checked)
 {
-    Config::ShowOSD = checked?1:0;
-    panel->osdSetEnabled(Config::ShowOSD);
+    showOSD = checked;
+    panel->osdSetEnabled(showOSD);
+    windowCfg.SetBool("ShowOSD", showOSD);
 }
 
 void MainWindow::onChangeLimitFramerate(bool checked)
 {
-    Config::LimitFPS = checked?1:0;
+    emuInstance->doLimitFPS = checked;
+    globalCfg.SetBool("LimitFPS", emuInstance->doLimitFPS);
 }
 
 void MainWindow::onChangeAudioSync(bool checked)
 {
-    Config::AudioSync = checked?1:0;
+    emuInstance->doAudioSync = checked;
+    globalCfg.SetBool("AudioSync", emuInstance->doAudioSync);
 }
 
 
diff --git a/src/frontend/qt_sdl/Window.h b/src/frontend/qt_sdl/Window.h
index c334c262..74ee21f6 100644
--- a/src/frontend/qt_sdl/Window.h
+++ b/src/frontend/qt_sdl/Window.h
@@ -234,6 +234,8 @@ private:
 
     void createScreenPanel();
 
+    bool showOSD;
+
     bool hasOGL;
 
     bool pausedManually = false;