diff --git a/src/debugger/gui/DebuggerDialog.cxx b/src/debugger/gui/DebuggerDialog.cxx
index f3a853f40..85a45911f 100644
--- a/src/debugger/gui/DebuggerDialog.cxx
+++ b/src/debugger/gui/DebuggerDialog.cxx
@@ -285,7 +285,7 @@ void DebuggerDialog::handleCommand(CommandSender* sender, int cmd,
 
         getDynamicBounds(w, h);
         myOptions = make_unique<OptionsDialog>(instance(), parent(), this, w, h,
-                                               OptionsMenu::AppMode::debugger);
+                                               AppMode::debugger);
       }
       myOptions->open();
 
diff --git a/src/gui/Dialog.hxx b/src/gui/Dialog.hxx
index d10de8301..e6cd4badd 100644
--- a/src/gui/Dialog.hxx
+++ b/src/gui/Dialog.hxx
@@ -44,6 +44,9 @@ class Dialog : public GuiObject
   friend class DialogContainer;
 
   public:
+    // Current Stella mode
+    enum class AppMode { launcher, emulator, debugger };
+
     using RenderCallback = std::function<void()>;
 
     Dialog(OSystem& instance, DialogContainer& parent,
diff --git a/src/gui/HighScoresDialog.cxx b/src/gui/HighScoresDialog.cxx
index cdfeaf58e..e51ecbc3a 100644
--- a/src/gui/HighScoresDialog.cxx
+++ b/src/gui/HighScoresDialog.cxx
@@ -98,7 +98,7 @@ static constexpr std::array<uInt32, BUTTON_GFX_H_LARGE> NEXT_GFX_LARGE = {
 // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
 HighScoresDialog::HighScoresDialog(OSystem& osystem, DialogContainer& parent,
                                    int max_w, int max_h,
-                                   OptionsMenu::AppMode mode)
+                                   AppMode mode)
   : Dialog(osystem, parent, osystem.frameBuffer().font(), "High Scores"),
     _max_w{max_w},
     _max_h{max_h},
@@ -219,7 +219,7 @@ HighScoresDialog::~HighScoresDialog()
 void HighScoresDialog::loadConfig()
 {
   // Enable blending (only once is necessary)
-  if (myMode == OptionsMenu::AppMode::emulator && !surface().attributes().blending)
+  if (myMode == AppMode::emulator && !surface().attributes().blending)
   {
     surface().attributes().blending = true;
     surface().attributes().blendalpha = 90;
@@ -314,7 +314,7 @@ void HighScoresDialog::handleCommand(CommandSender* sender, int cmd, int data, i
       saveConfig();
       [[fallthrough]];
     case kCloseCmd:
-      if(myMode != OptionsMenu::AppMode::emulator)
+      if(myMode != AppMode::emulator)
         close();
       else
         instance().eventHandler().leaveMenuMode();
diff --git a/src/gui/HighScoresDialog.hxx b/src/gui/HighScoresDialog.hxx
index 530088632..d3d3a4e94 100644
--- a/src/gui/HighScoresDialog.hxx
+++ b/src/gui/HighScoresDialog.hxx
@@ -47,7 +47,7 @@ class HighScoresDialog : public Dialog
     static constexpr uInt32 NUM_RANKS = 10;
 
     HighScoresDialog(OSystem& osystem, DialogContainer& parent,
-                     int max_w, int max_h, OptionsMenu::AppMode mode);
+                     int max_w, int max_h, AppMode mode);
     ~HighScoresDialog() override;
 
   protected:
@@ -110,7 +110,7 @@ class HighScoresDialog : public Dialog
     StaticTextWidget* myMD5Widget{nullptr};
     StaticTextWidget* myCheckSumWidget{nullptr};
 
-    OptionsMenu::AppMode myMode{OptionsMenu::AppMode::emulator};
+    AppMode myMode{AppMode::emulator};
 
   private:
     // Following constructors and assignment operators not supported
diff --git a/src/gui/HighScoresMenu.cxx b/src/gui/HighScoresMenu.cxx
index 9ca4d0b29..9a65d1c06 100644
--- a/src/gui/HighScoresMenu.cxx
+++ b/src/gui/HighScoresMenu.cxx
@@ -38,7 +38,7 @@ Dialog* HighScoresMenu::baseDialog()
   if (myHighScoresDialog == nullptr)
     myHighScoresDialog = new HighScoresDialog(myOSystem, *this,
                                               FBMinimum::Width, FBMinimum::Height,
-                                              OptionsMenu::AppMode::emulator);
+                                              Dialog::AppMode::emulator);
 
   return myHighScoresDialog;
 }
diff --git a/src/gui/LauncherDialog.cxx b/src/gui/LauncherDialog.cxx
index c97d47791..a8976e8a6 100644
--- a/src/gui/LauncherDialog.cxx
+++ b/src/gui/LauncherDialog.cxx
@@ -926,10 +926,10 @@ void LauncherDialog::openSettings()
   // Create an options dialog, similar to the in-game one
   if (instance().settings().getBool("basic_settings"))
     myDialog = make_unique<StellaSettingsDialog>(instance(), parent(),
-                                                 _w, _h, OptionsMenu::AppMode::launcher);
+                                                 _w, _h, AppMode::launcher);
   else
     myDialog = make_unique<OptionsDialog>(instance(), parent(), this, _w, _h,
-                                          OptionsMenu::AppMode::launcher);
+                                          AppMode::launcher);
   myDialog->open();
 }
 
@@ -938,7 +938,7 @@ void LauncherDialog::openHighScores()
 {
   // Create an high scores dialog, similar to the in-game one
   myDialog = make_unique<HighScoresDialog>(instance(), parent(), _w, _h,
-                                           OptionsMenu::AppMode::launcher);
+                                           AppMode::launcher);
   myDialog->open();
 }
 
diff --git a/src/gui/MinUICommandDialog.cxx b/src/gui/MinUICommandDialog.cxx
index e58094b53..de3728d98 100644
--- a/src/gui/MinUICommandDialog.cxx
+++ b/src/gui/MinUICommandDialog.cxx
@@ -321,14 +321,14 @@ void MinUICommandDialog::openSettings()
   if (instance().settings().getBool("basic_settings"))
   {
     myDialog = make_unique<StellaSettingsDialog>(instance(), parent(),
-                                                 1280, 720, OptionsMenu::AppMode::launcher);
+                                                 1280, 720, AppMode::launcher);
     myDialog->open();
   }
   else
   {
     myDialog = make_unique<OptionsDialog>(instance(), parent(), this,
                                           FBMinimum::Width, FBMinimum::Height,
-                                          OptionsMenu::AppMode::launcher);
+                                          AppMode::launcher);
     myDialog->open();
   }
 }
@@ -337,6 +337,6 @@ void MinUICommandDialog::openSettings()
 void MinUICommandDialog::openHighscores()
 {
   myDialog = make_unique<HighScoresDialog>(instance(), parent(),
-                                           1280, 720, OptionsMenu::AppMode::emulator);
+                                           1280, 720, AppMode::emulator);
   myDialog->open();
 }
diff --git a/src/gui/OptionsDialog.cxx b/src/gui/OptionsDialog.cxx
index 646be5220..32c72e368 100644
--- a/src/gui/OptionsDialog.cxx
+++ b/src/gui/OptionsDialog.cxx
@@ -47,13 +47,13 @@
 
 // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
 OptionsDialog::OptionsDialog(OSystem& osystem, DialogContainer& parent,
-                             GuiObject* boss, int max_w, int max_h, OptionsMenu::AppMode mode)
+                             GuiObject* boss, int max_w, int max_h, AppMode mode)
   : Dialog(osystem, parent, osystem.frameBuffer().font(), "Options"),
     myBoss{boss},
     myMode{mode}
 {
   // do not show basic settings options in debugger
-  bool minSettings = osystem.settings().getBool("minimal_ui") && mode != OptionsMenu::AppMode::debugger;
+  bool minSettings = osystem.settings().getBool("minimal_ui") && mode != AppMode::debugger;
   const int buttonHeight = Dialog::buttonHeight(),
             VBORDER      = Dialog::vBorder(),
             HBORDER      = Dialog::hBorder(),
@@ -138,7 +138,7 @@ OptionsDialog::OptionsDialog(OSystem& osystem, DialogContainer& parent,
   addToFocusList(wid);
 
   // Certain buttons are disabled depending on mode
-  if(myMode == OptionsMenu::AppMode::launcher)
+  if(myMode == AppMode::launcher)
   {
     myCheatCodeButton->clearFlags(Widget::FLAG_ENABLED);
   }
@@ -186,7 +186,7 @@ void OptionsDialog::handleCommand(CommandSender* sender, int cmd,
     case kBasSetCmd:
       // enable basic settings
       instance().settings().setValue("basic_settings", true);
-      if (myMode != OptionsMenu::AppMode::emulator)
+      if (myMode != AppMode::emulator)
         close();
       else
         instance().eventHandler().leaveMenuMode();
@@ -297,7 +297,7 @@ void OptionsDialog::handleCommand(CommandSender* sender, int cmd,
       break;
 
     case kExitCmd:
-      if(myMode != OptionsMenu::AppMode::emulator)
+      if(myMode != AppMode::emulator)
         close();
       else
         instance().eventHandler().leaveMenuMode();
diff --git a/src/gui/OptionsDialog.hxx b/src/gui/OptionsDialog.hxx
index ce16245c6..7388289e4 100644
--- a/src/gui/OptionsDialog.hxx
+++ b/src/gui/OptionsDialog.hxx
@@ -30,7 +30,7 @@ class OptionsDialog : public Dialog
 {
   public:
     OptionsDialog(OSystem& osystem, DialogContainer& parent, GuiObject* boss,
-                  int max_w, int max_h, OptionsMenu::AppMode mode);
+                  int max_w, int max_h, AppMode mode);
     ~OptionsDialog() override;
 
   private:
@@ -46,7 +46,7 @@ class OptionsDialog : public Dialog
 
     GuiObject* myBoss{nullptr};
     // Indicates if this dialog is used for global (vs. in-game) settings
-    OptionsMenu::AppMode myMode{OptionsMenu::AppMode::emulator};
+    AppMode myMode{AppMode::emulator};
 
     enum {
       kBasSetCmd   = 'BAST',
diff --git a/src/gui/OptionsMenu.cxx b/src/gui/OptionsMenu.cxx
index f12c6bed9..ed4af6353 100644
--- a/src/gui/OptionsMenu.cxx
+++ b/src/gui/OptionsMenu.cxx
@@ -44,14 +44,14 @@ Dialog* OptionsMenu::baseDialog()
   {
     if (stellaSettingDialog == nullptr)
       stellaSettingDialog = new StellaSettingsDialog(myOSystem, *this,
-                                                     1280, 720, AppMode::emulator);
+                                                     1280, 720, Dialog::AppMode::emulator);
     return stellaSettingDialog;
   }
   else
   {
     if (optionsDialog == nullptr)
       optionsDialog = new OptionsDialog(myOSystem, *this, nullptr,
-        FBMinimum::Width, FBMinimum::Height, AppMode::emulator);
+        FBMinimum::Width, FBMinimum::Height, Dialog::AppMode::emulator);
     return optionsDialog;
   }
 }
diff --git a/src/gui/OptionsMenu.hxx b/src/gui/OptionsMenu.hxx
index 3329d18ca..bb3e02215 100644
--- a/src/gui/OptionsMenu.hxx
+++ b/src/gui/OptionsMenu.hxx
@@ -32,9 +32,6 @@ class OptionsDialog;
 class OptionsMenu : public DialogContainer
 {
   public:
-    // Current Stella mode
-    enum class AppMode { launcher, emulator, debugger };
-
     /**
       Create a new menu stack
     */
diff --git a/src/gui/StellaSettingsDialog.cxx b/src/gui/StellaSettingsDialog.cxx
index 604b836d0..15c87611f 100644
--- a/src/gui/StellaSettingsDialog.cxx
+++ b/src/gui/StellaSettingsDialog.cxx
@@ -30,7 +30,7 @@
 
 // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
 StellaSettingsDialog::StellaSettingsDialog(OSystem& osystem, DialogContainer& parent,
-  int max_w, int max_h, OptionsMenu::AppMode mode)
+  int max_w, int max_h, AppMode mode)
   : Dialog(osystem, parent, osystem.frameBuffer().font(), "Basic settings"),
     myMode{mode}
 {
@@ -351,7 +351,7 @@ void StellaSettingsDialog::handleCommand(CommandSender* sender, int cmd,
       saveConfig();
       [[fallthrough]];
     case GuiObject::kCloseCmd:
-      if (myMode != OptionsMenu::AppMode::emulator)
+      if (myMode != AppMode::emulator)
         close();
       else
         instance().eventHandler().leaveMenuMode();
@@ -363,7 +363,7 @@ void StellaSettingsDialog::handleCommand(CommandSender* sender, int cmd,
 
     case kConfirmSwitchCmd:
       instance().settings().setValue("basic_settings", false);
-      if (myMode != OptionsMenu::AppMode::emulator)
+      if (myMode != AppMode::emulator)
         close();
       else
         instance().eventHandler().leaveMenuMode();
diff --git a/src/gui/StellaSettingsDialog.hxx b/src/gui/StellaSettingsDialog.hxx
index a0349eb12..5e05a6d6a 100644
--- a/src/gui/StellaSettingsDialog.hxx
+++ b/src/gui/StellaSettingsDialog.hxx
@@ -39,7 +39,7 @@ class StellaSettingsDialog : public Dialog
 {
   public:
     StellaSettingsDialog(OSystem& osystem, DialogContainer& parent,
-      int max_w, int max_h, OptionsMenu::AppMode mode);
+      int max_w, int max_h, AppMode mode);
     ~StellaSettingsDialog() override;
 
   private:
@@ -103,7 +103,7 @@ class StellaSettingsDialog : public Dialog
   #endif
 
     // Indicates if this dialog is used for global (vs. in-game) settings
-    OptionsMenu::AppMode myMode{OptionsMenu::AppMode::emulator};
+    AppMode myMode{AppMode::emulator};
 
     enum {
       kAdvancedSettings = 'SSad',