Can't get into game after most recent patch

[Jake Blood 7]

So, I am PC... downloaded recent patch, 538.6, and loaded game. It freezes at the load screen after I try to join a server. Tried several times, same result. Tried to validate files through Steam twice, both times it told me it found a bad file and would acquire it... still freezes at load screen. Uninstalled the game, reinstalled, still freezes. Tried validating two more times, same result. I am hoping someone on here knows how to fix it. 

One thing I find odd, is that the patch notes say that this is version 538.6, but oddly enough the main screen says 539. Not sure if that has anything to do with it, but I need help. 

 

Thank you in advance.