Damn, really sorry to hear you hate it so much, especially with how often it updates. Makes me appreciate all the trainer updates even more.
5.4.0 now, played it yesterday with everything working, but only ammo is willing to cooperate now.
Is there a way we can contribute/manually patch the trainer that works for people like me? (dumb people with little programming knowledge)
If you are like me you go and fire each weapon one time and them turn it on. This may sound odd but make sure the saw blade has completely stopped moving before you try and turn on the Inf ammo. That seemed to allowed me to use it with out a crash.