diff --git a/ExampleMod/build.txt b/ExampleMod/build.txt
index 480e8bede01..1ce9a5409e1 100644
--- a/ExampleMod/build.txt
+++ b/ExampleMod/build.txt
@@ -1,5 +1,5 @@
 author = TML Team
-version = 0.11.8.2
+version = 0.11.8.3
 displayName = Example Mod
 homepage = https://tmodloader.net/
 hideCode = false
diff --git a/patches/tModLoader/Terraria.ModLoader.Engine/InstallVerifier.cs b/patches/tModLoader/Terraria.ModLoader.Engine/InstallVerifier.cs
index 8a646763d39..912f45c1ffe 100644
--- a/patches/tModLoader/Terraria.ModLoader.Engine/InstallVerifier.cs
+++ b/patches/tModLoader/Terraria.ModLoader.Engine/InstallVerifier.cs
@@ -30,20 +30,20 @@ static InstallVerifier()
 			if (Platform.IsWindows) {
 				steamAPIPath = "steam_api.dll";
 				steamAPIHash = ToByteArray("7B857C897BC69313E4936DC3DCCE5193");
-				gogHash = ToByteArray("bd38e2c11df154bcecee8ab3191927ab");
-				steamHash = ToByteArray("6ebb2e222126aaae302d34a3a2c82cb9");
+				gogHash = ToByteArray("ff61b96a07894a9e65f880fb9608fb37"); // Don't forget to update CheckExe in CheckGoG
+				steamHash = ToByteArray("4fd8072ca82ded3d9da1be577a478788");
 			}
 			else if (Platform.IsOSX) {
 				steamAPIPath = "osx/libsteam_api.dylib";
 				steamAPIHash = ToByteArray("4EECD26A0CDF89F90D4FF26ECAD37BE0");
-				gogHash = ToByteArray("35aaadbe74ea4568bcc656e47d195224");
-				steamHash = ToByteArray("dc252bb25a6109687f15c3d3b1ae5542");
+				gogHash = ToByteArray("181c586d0fe64156adb0ecd4b9fabf9d");
+				steamHash = ToByteArray("12c8d2ac5af6c8505bd1a9339dc75231");
 			}
 			else if (Platform.IsLinux) {
 				steamAPIPath = "lib/libsteam_api.so";
 				steamAPIHash = ToByteArray("7B74FD4C207D22DB91B4B649A44467F6");
-				gogHash = ToByteArray("2a46360324905fbd26bbc9ae9f68d25d");
-				steamHash = ToByteArray("89a6dc94a2e14f5dcd92f7f54476c062");
+				gogHash = ToByteArray("4a051352dd6ecc323c5a0a15e5b598fb");
+				steamHash = ToByteArray("debcc318ca4e14295e3ac22e380e289b");
 			}
 			else {
 				string message = Language.GetTextValue("tModLoader.UnknownVerificationOS");
@@ -122,7 +122,7 @@ private static bool CheckGoG()
 			IsGoG = true;
 
 			const string DefaultExe = "Terraria.exe";
-			string CheckExe = $"Terraria_1.4.1.2.exe"; // {Main.versionNumber}
+			string CheckExe = $"Terraria_1.4.2.1.exe"; // This should match the hashes. {Main.versionNumber}
 			string vanillaPath = File.Exists(CheckExe) ? CheckExe : DefaultExe;
 
 			// If .exe not present, check Terraria directory (Side-by-Side Manual Install)
@@ -147,13 +147,13 @@ private static bool CheckGoG()
 #endif
 				string defaultExe = Path.Combine(vanillaPath, DefaultExe);
 				string checkExe = Path.Combine(vanillaPath, CheckExe);
-				vanillaPath = File.Exists(defaultExe) ? defaultExe : checkExe;
+				vanillaPath = File.Exists(checkExe) ? checkExe : defaultExe;
 			}
 			// If .exe not present check parent directory (Nested Manual Install)
 			if (!File.Exists(vanillaPath)) {
 				string defaultExe = Path.Combine("..", DefaultExe);
 				string checkExe = Path.Combine("..", CheckExe);
-				vanillaPath = File.Exists(defaultExe) ? defaultExe : checkExe;
+				vanillaPath = File.Exists(checkExe) ? checkExe : defaultExe;
 			}
 
 			if (!File.Exists(vanillaPath)) {
@@ -170,6 +170,12 @@ private static bool CheckGoG()
 				return false;
 			}
 
+			if (Path.GetFileName(vanillaPath) != CheckExe) {
+				string pathToCheckExe = Path.Combine(Path.GetDirectoryName(vanillaPath), CheckExe);
+				Logging.tML.Info($"Backing up {Path.GetFileName(vanillaPath)} to {CheckExe}");
+				File.Copy(vanillaPath, pathToCheckExe);
+			}
+
 			Logging.tML.Info("GOG or manual installation OK.");
 			return true;
 		}
diff --git a/patches/tModLoader/Terraria.ModLoader/ModLoader.cs b/patches/tModLoader/Terraria.ModLoader/ModLoader.cs
index 2b40251ca42..319cf438aae 100644
--- a/patches/tModLoader/Terraria.ModLoader/ModLoader.cs
+++ b/patches/tModLoader/Terraria.ModLoader/ModLoader.cs
@@ -27,7 +27,7 @@ namespace Terraria.ModLoader
 	/// </summary>
 	public static class ModLoader
 	{
-		public static readonly Version version = new Version(0, 11, 8, 2);
+		public static readonly Version version = new Version(0, 11, 8, 3);
 		// Stores the most recent version of tModLoader launched. Can be used for migration.
 		public static Version LastLaunchedTModLoaderVersion;
 		// public static bool ShowWhatsNew;
diff --git a/solutions/CompleteRelease.bat b/solutions/CompleteRelease.bat
index fe097567a9e..19a9cef3779 100644
--- a/solutions/CompleteRelease.bat
+++ b/solutions/CompleteRelease.bat
@@ -4,7 +4,7 @@
 @ECHO off
 :: Compile/Build exe 
 echo "Building Release"
-set tModLoaderVersion=v0.11.8.2
+set tModLoaderVersion=v0.11.8.3
 call buildRelease.bat
 
 set destinationFolder=.\tModLoader %tModLoaderVersion% Release
diff --git a/solutions/ReleaseExtras/version b/solutions/ReleaseExtras/version
index 3a336d48073..eea2f20398f 100644
--- a/solutions/ReleaseExtras/version
+++ b/solutions/ReleaseExtras/version
@@ -1 +1 @@
-v0.11.8.2
\ No newline at end of file
+v0.11.8.3
\ No newline at end of file
diff --git a/solutions/documentation/Doxyfile b/solutions/documentation/Doxyfile
index 46a1c9e5cfc..8ccdc9879d4 100644
--- a/solutions/documentation/Doxyfile
+++ b/solutions/documentation/Doxyfile
@@ -38,7 +38,7 @@ PROJECT_NAME           = "Terraria ModLoader"
 # could be handy for archiving the generated documentation or if some version
 # control system is used.
 
-PROJECT_NUMBER         = 0.11.8.2
+PROJECT_NUMBER         = 0.11.8.3
 
 # Using the PROJECT_BRIEF tag one can provide an optional one line description
 # for a project that appears at the top of each page and should give viewer a