Just an FYI, the editor section of the latest trainer for Epic works with the GoG version of the game, at least it did for me just now.
Thanks for letting us know!
Using Aurora I have launched game from Aurora and from the game shortcut. Aurora activates just fine with F1 or by activating directly from Aurora. Have activated from main menu and while in the current game. In all instances the game immediately crashes when I press any of the keypad options or when an edited quantity activates upon ending turn. Same thing as before the steam platform was added.
then reach out to the trainer maker to see if they still have the game installed