Thanks a lot for this as I'm also interested in the last working version of GM with the cheat table.
At this point it comes across as ambitious to hope for someone to be capable of updating the GM script for the latest version but I can still hope for the "Enhanced" Edition.
What I think I'm gonna try is keeping an ".exe" of the last working version of the game's executable for the GM script and just replace the latest ".exe" with the older one whenever I need to use it. Just an idea for those who are also struggling. Not entirely sure this works but in theory it should.
Now the question is where can I get that Steam version of the game? Does anyone have them to share?