Instalscript.iss still has error in reg section.. the item shown in RED wont match unless its changed to match installers choice of language.
Code:
Root: HKLM; SubKey: "SOFTWARE\{code:GetAppPublisher}\{code:GetAppName}\GameUpdate"; ValueType: string; ValueName: language; ValueData: us; Flags: uninsdeletevalue uninsdeletekeyifempty