Hey there. I've had this problem for a while now, and I've also asked for help on the official steamcommunity forums, but got no usefull answers.

My MvM upgrades are kinda "broken" (doesn't matter if its Boot Camp or Mann Up, It's still broken). In some of the problems, the "images/titles" are there, and some aren't even there. Let me give you some examples;

As a medic, I can't for example purchase the Projectile Shield (my medi gun only has 2 upgrades there, and that's Uber duration and Uber rate)

I can only purchase the Kritz and Uber Power up canteen, none of the other's work.

If I upgrades Pyro's Airblast, It purchases teleport power up canteen, but that doesn't work (and all the previous upgrades disappears)

Some of the upgrades aren't even true, since the Movement speed is restistance, and some doesn't even work.

Etc, etc...

Some screenshots;

http://i.imgur.com/Pv0E6cJ.jpg

http://i.imgur.com/mjyrBp6.jpg

Any ideas on how I can fix this? I've already tried to update the game cache, and re-installing the whole game, but that didn't work. Please?