If you are facing an activation loop, the standard community-recommended procedure is to refresh the local authentication data: Clear Old Tokens

In many pirated releases of The Bus , the standard activation process is bypassed by placing a modified or "patched" text file (often named activation_key.txt ) into the game’s directory. This file tricks the game's launcher or executable into believing the software has been verified through official servers (like Aerosoft or Steam). How the Patch is Typically Applied