Add checkbox to set windows version to 7

src/XIVLauncher.Core/Components/MainPage/MainPage.cs

@@ -731,6 +731,10 @@ public async Task<Process> StartGameAndAddon(Launcher.LoginResult loginResult, b
             }
         }
 
+        var winver = (App.Settings.SetWin7 ?? false) ? "win7" : "win10";
+
+        Program.CompatibilityTools.RunInPrefix($"winecfg /v {winver}");
+
         if (Environment.OSVersion.Platform == PlatformID.Win32NT)
         {
             runner = new WindowsGameRunner(dalamudLauncher, dalamudOk, Program.DalamudUpdater.Runtime);

src/XIVLauncher.Core/Components/SettingsPage/Tabs/SettingsTabWine.cs

@@ -50,6 +50,8 @@ public SettingsTabWine()
                 }
             },
 
+            new SettingsEntry<bool>("Set Windows version to 7", "Default is 10. Setting to 7 may fix some networking issues with plugins.", () => Program.Config.SetWin7 ?? false, b => Program.Config.SetWin7 = b),
+
             new SettingsEntry<Dxvk.DxvkHudType>("DXVK Overlay", "Configure how much of the DXVK overlay is to be shown.", () => Program.Config.DxvkHudType, type => Program.Config.DxvkHudType = type),
             new SettingsEntry<string>("WINEDEBUG Variables", "Configure debug logging for wine. Useful for troubleshooting.", () => Program.Config.WineDebugVars ?? string.Empty, s => Program.Config.WineDebugVars = s)
         };

src/XIVLauncher.Core/Configuration/ILauncherConfig.cs

@@ -82,6 +82,8 @@ public interface ILauncherConfig
 
     public bool? FixIM { get; set; }
 
+    public bool? SetWin7 { get; set; }
+
     #endregion
 
     #region Dalamud

src/XIVLauncher.Core/Program.cs

@@ -118,6 +118,7 @@ private static void LoadConfig(Storage storage)
         Config.DxvkAsyncEnabled ??= true;
         Config.ESyncEnabled ??= true;
         Config.FSyncEnabled ??= false;
+        Config.SetWin7 ??= true;
 
         Config.WineStartupType ??= WineStartupType.Managed;
         Config.WineBinaryPath ??= "/usr/bin";