The newer trainers have a tab for it right on the trainer but I don't think there's one on that game as it's an older template.
Try looking for:
User Name / Cheathappens / Debug / Game Name
Try there and you should be able to open it with Notepad.
[Edited by Jaks, 3/30/2020 10:28:06 PM]
Did you verify the game files on Steam and check Windows Event Viewer?
Have you tried playing awhile past that point without the trainer to see if the game closes anyway?
Did you do each of the things DragonStryder suggested? Did you add an exclusion for the trainer Exe file in your (yes, I know it's disabled) anti-virus?
You should try all of these before we run out of suggestions. About all that's left is to try the Troubleshooter.
[Edited by Jaks, 3/31/2020 11:52:10 AM]