Hi I seen some chatter about this or that regarding the killing floor game. I have participated in I believe all of the Steam achievement hunts(And I haven't missed a single KF achievement). One thing I have noticed is the annoying 2mb patches every 3 days for 1 game and it has an impact on the trainer. Something though that I found works really well for me is that when everything returns to normal and you have a working trainer. Level up all of your perks or at least just 1 or 2 I prefer marksman and support(shotguns). Your character data gets saved in the steam cloud(So you can uninstall for 6 months until the next achievement turns up and reinstall and you will have all your perks saved). And then during these times when there is an avalanche of patches if you have a higher level perk you will just wreck without any cheats.
TL;DR Level up your perks whenever you can however you can and you will become more self sufficient with this game.