I guess you ask that because you used my trainer and not
Unknow_XY 's. My trainer indeed has a mist selector + some additional features like HP regen and extra cloth damage etc. but it works with a completely different method than Unknow_XY and for now the code is a mess, I don't really like it.
It has the Mist selector though. You can try this version:
Trainer v1.2
I haven't noticed any critical bug, but there are likely some. I don't use pointer maps to find the addresses. Instead I've reverse-engineered some of the GameMaker structures, I can access most simple variables. In theory this method should be more powerful, it allowed me to do this
mod for Moon Rhapsody (game by the same author). But it's also more prone to bugs in my code (which might lead to the game randomly close, let me know if you observe that).