Foundry crashing when pressing Alt

demonstormuk

So, this is my second post on this topic, but since the last patch, whenever I press alt to enter mouselook while testing my module, the game crashes entirely. This is even after a full re-install of the game. It happens in a new module as well. I created a module to see if my original module had been corrupted some how, but no, its happening in a new quest on different maps as well. Can anyone else confirm this or, post a work around?