Terraria 1.3.5.3 error (tmodloader v0.11.80 (Terraria)

[13:50:54] [1 / INFO] [tML]: Starting tModLoader v0.11.8 Windows client (06/07/2021)
[13:50:54] [1 / INFO] [tML]: Running on NetFramework 4.6.1
[13:50:54] [1 / INFO] [tML]: Executable: D: Catalyst Terraria Terraria_v1.3.5.3 (2) .exe
[13:50:54] [1 / INFO] [tML] : Working Directory: D: Catalyst Terraria
[13:50:54] [1 / INFO] [tML]: Launch Parameters:
[13:50:54] [1 / DEBUG] [tML]: Assembly Resolve: -> MonoMod.RuntimeDetour, Version = 20.11.16.1, Culture = neutral, PublicKeyToken = null
[13:50:54] [1 / DEBUG] [tML]: Assembly Resolve: MonoMod.RuntimeDetour, Version = 20.11.16.1, Culture = neutral, PublicKeyToken = null -> MonoMod.Utils, Version = 20.11.16.1, Culture = neutral, PublicKeyToken = null
[13:50:54] [1 / DEBUG] [tML]: Assembly Resolve: MonoMod.RuntimeDetour, Version = 20.11.16.1, Culture = neutral, PublicKeyToken = null -> Mono.Cecil, Version = 0.11.3.0, Culture = neutral, PublicKeyToken = 50cebf1cceb9d05e
[13:50:55] [1 / DEBUG] [tML]: Assembly Resolve: -> Ionic.Zip.Reduced, Version = 1.9.1.8, Culture = neutral, PublicKeyToken = edbe51ad942a3f5c
[13:50: 55] [1 / DEBUG] [tML]: Assembly Resolve: -> Newtonsoft.Json, Version = 10.0.0.0, Culture = neutral, PublicKeyToken = 30ad4fe6b2a6aeed
[13:50:56] [1 / INFO] [tML]: Checking GOG or manual installation ...
[13:50:57] [1 / FATAL] [tML]: Terraria.exe is not the unmodified Terraria executable.

GOG installs must have the unmodified Terraria executable to function.

If you patched the .exe, you can create a copy of the original exe and name it "Terraria_v.exe"