regarding the invisible option and some people reporting crashing:
turn the option off when not needed is my only suggestion since i cannot repeat your problem here.
i can't 'fix' a problem with invisible option if there isn't a repeatable crash using it. i just tested the option here destroying wave after wave of enemies with it on for much longer than 5 minutes with no problems.
Guys, thanks for the update of trainer to 1.02, looks to me there are two version of trainer/editor listed. Is there a trainer only version as I cannot run the one with an editor.