For the people who it is crashing for try this:
Start the game normally. Don't select the continue game from the launcher.
Start the trainer on the main menu but don't activate it.
Start a new/load a game
Once the game is loaded or started, select your lord
Alt Tab to the trainer
Activate trainer (do this from outside the game. Thus, the Alt Tab)
Alt Tab back into game and it should be working.
You can turn the options off and on from in game, but I tend to do it from outside out of habit. This is how I have always activated the trainer and unless an updated trainer has been needed, it's never failed. Although influence is broken on the ME campaign, never tried it in the Vortex. Please note though, that the longer the game goes and the longer you have the cheats activated, the higher a chance you have to crash. I usually crash once around turn 120. Also, the more you activate and deactivate the cheats, the higher a chance you'll crash.
I know nothing about coding, or programming or anything like that, but if a group of people are having crashes that are doing the exact same thing that a group of people who are not having crashes are doing, then perhaps there is a common factor that all the crashers have?
Also guys/gals, please remember that these trainers are free. And there are a LOT of trainers on this site. So understand that sometimes, the update isn't ready for a few weeks after a patch.