Hello, Mister Antifun.
For me, some of the options of the trainer don't work, and it must be activated while loading the game, not a save.
I've tested it on 2 computer, on each one, the game is on SSD, teh game is an original cpoy 'bought on Steam).
And when I can activate it, it is always after a couple of minutes in game, the game shut down without further explanation.
But if it works fine with you or other members, I guess I'll re-install the OS, the game, and try again (already did it 6 months ago, but meh, gaming pc, formating is not a big deal nowadays).