Walt Here are issues with steam version of cosmoteer.
When You try to use mod upgrader on steam version of Cosmoteer.. Then You get the message "That directory does not appear to be the Cosmoteer installation directory!".
It's becouse cosmoteer.exe is in bin directory instead of game root directory..
So You can bypasse it by copying game exe to game root directory.
After that You will be able to use game steam directory for mod upgrader.
@Walt Please May You fix it in next version of mod upgrader by checking if game exe isn't located in /bin/ directory as secound place? THX 🙂