Game (Skyrim) in wine lagging bad after software update

i’m new to ubuntu and i think i just screwed up. an hour ago i installed the new software updates and after starting skyrim in playonlinux/wine it’s lagging really bad (10fps). yesterday it worked fine, so it must be the update. the loading screen also take longer and is flickering. i installed ubuntu a few weeks ago and don’t know what i’m doing. so far i was lucky, up until now it seems. i suppose there is no magic reverse button for the software update. the only solution i can think of is installing ubuntu again from the usb stick i used to install it a few weeks ago and download playonlinux and skyrim again. maybe someone who isn’t a noob has the same problem and knows what to do. thanks in advance.