I appear to have the same issues here. Some editor options work such as lives, deaths, and gold, but trying to change health, mana, keys or use the unlimited options for mana and health either crash the trainer (unusually but sometimes) or just have no effect.
I'm not able to tell which version of the game I'm running but it should be whatever the most recent is as I purchased it today and installed on the same day.
Really neat game too. I'd highly recommend anyone pick it up, trainer or no trainer. Loving it.