diff --git a/src/XIVLauncher.Core/CoreEnvironmentSettings.cs b/src/XIVLauncher.Core/CoreEnvironmentSettings.cs
index c543c281..3ecd7d54 100644
--- a/src/XIVLauncher.Core/CoreEnvironmentSettings.cs
+++ b/src/XIVLauncher.Core/CoreEnvironmentSettings.cs
@@ -16,7 +16,7 @@ public static class CoreEnvironmentSettings
     public static bool ClearAll => CheckEnvBool("XL_CLEAR_ALL");
     public static bool? UseSteam => CheckEnvBoolOrNull("XL_USE_STEAM"); // Fix for Steam Deck users who lock themselves out
     public static bool IsSteamCompatTool => CheckEnvBool("XL_SCT");
-    public static int AltAppID => GetAltAppId(System.Environment.GetEnvironmentVariable("XL_APPID"));
+    public static uint AltAppID => GetAltAppId(System.Environment.GetEnvironmentVariable("XL_APPID"));
 
     private static bool CheckEnvBool(string key)
     {
@@ -40,13 +40,13 @@ public static string GetCleanEnvironmentVariable(string envvar, string badstring
         return string.Join(separator, Array.FindAll<string>(dirty.Split(separator, StringSplitOptions.RemoveEmptyEntries), s => !s.Contains(badstring)));
     }
 
-    public static int GetAltAppId(string? appid)
+    public static uint GetAltAppId(string? appid)
     {
-        int result;
-        if (int.TryParse(appid, out result))
-            return result;
-        else
-            return -1;
+        uint result;
+        uint.TryParse(appid, out result);
+        
+        // Will return 0 if appid is invalid (or zero).
+        return result;
     }
 
     public static string GetCType()
diff --git a/src/XIVLauncher.Core/Program.cs b/src/XIVLauncher.Core/Program.cs
index f32407e0..6a169c2a 100644
--- a/src/XIVLauncher.Core/Program.cs
+++ b/src/XIVLauncher.Core/Program.cs
@@ -196,9 +196,10 @@ private static void Main(string[] args)
 
         uint appId, altId;
         string appName, altName;
+        // AppId of 0 is invalid (though still a valid uint)
         if (CoreEnvironmentSettings.AltAppID > 0)
         {
-            appId = (uint)CoreEnvironmentSettings.AltAppID;
+            appId = CoreEnvironmentSettings.AltAppID;
             altId = STEAM_APP_ID_FT;
             appName = $"Override AppId={appId.ToString()}";
             altName = "FFXIV Free Trial";