Okay it works 100% for me now but ONLY if I run through the process properly.
- Open trainer first, run game, press F1 at title screen.
Stats can be altered via trainer and the whole bit, no problem. However, say I want to alter my stats legit like (equip items, etc.). I have to deactivate the trainer. So I quit the game but leave the trainer open. I restart the game with the trainer deactivated and I can alter my stats legit like again. If I decide to reactivate the trainer at this point though, it doesn't work 100% (stats can't be increased via the trainer). I have to quit EVERYTHING and follow the proper procedure to reactivate the trainer, then it works 100% again. I hope this makes sense.
[Edited by guardiane, 2/26/2016 6:16:28 PM]
Yeah, afraid there's no way of editing stats with the trainer, but if you want, you can just boost a chars level, setting a disposable caracter's level to 500 or so, and use him to blaze through the story, so you can find the best training spots and level up/grind money/mana with ease.
So basically, levels and hell stay the same even with the trainer turned off, saving and quitting the game.