tried company of heroes 2, trainer runs without problem.
Can you confirm the crash of using the Borderlands 2 Trainer and that the Editor doesn't crash?
OK tested borderlands 2 trainer,pressing F1 crashes game,when game is started VIA steam game shortcut, game getting frozen, after game is gone from "memory" you hear the trainer voice "activated" HOWEVER, starting trainer then starting borderlands2.exe itself, and pressing trainer F1 key, doesn't crash the game and trainer works normally.
The editor works in both conditions that i tested the trainer with, encountered no problems whatsoever.
suggesting testing trainers with the game executable itself, bypassing steam game startup shortcut, if possible
then test again
[Edited by jackbig, 7/9/2013 8:53:30 AM]