Originally posted by Spook:

Me too, can't jump, and can't demolish. I have mods, maybe one of those is blocking it somehow?

This is almost certainly the case, the majority of modders will not have had time to update to the latest version of the game yet. Maybe stick your mods into a "VH-MODS" folder and try vanilla? If it still happens then, I'd suggest re-validating your game and seeing if that helped.