The F6 feature (Instant units) does not work no matter what i do.
Just played a full game with ALL options tested, either you do something wrong, nor you have a prob on your system!
Have you deleted the old trainer files from T-manager and/or your download directory? Cleared the cache?
The trainer is working 100% on my system.
Fast Build Units, Fast Research and Fast build buildings seems to be the ones that always don't work properly and when it gets fixed other options break and we have no answer to it.
The answer is to ask for a refund from the game devs and tell them to let you know when they actually finish it 5 years from now. Every time we release a trainer, they patch the game usually within a few hours. It's stupid.