Im having a key file issue with 4.33U1 as well.
I cannot seem to get my left MFD or throttle (TM warthog) to work properly. Everything worked just fine in 4.33…. I think it has something to do with the game trying to switch my controller ports?? Some of the buttons on my Left MFD are doing some of the intended functions of my throttle…
Any help would be great. thanks