I have the latest vsn of the game on steam, and no matter what I've tried I can't get any of the trainer options to execute. I tried to activate on the main menu, on the single player menu, and even in game as one post suggested. In game, F1 launches an info screen, but it did not activate the trainer.
we have 3500 people using the trainer.
One thing to try is to activate the trainer once the actual game is started (i.e. you see your units, etc.)
best,
Cal