I just updated my zorin 15 with an automatic update. Should have known better and just left well enough as is. Now my graphics are acting badly. My best guess from what I can tell after a bit of research online is that the update didn't load completely. How can I roll back to what it was before this last update? The command line scares the hell out of me, and I don't want to have to try to save everything and then reinstall zorin from scratch (AGAIN). When I go to the updater, it goes through its motions and then says that it couldn't download any updates and to check my internet connection, then says it found no updates. Thanks in advance for your help!