After an update, you should be able to revert to a previous version if that works. I'm not sure if Valve prefers it, but it might mean you can't play MM on an older release. Give it a shot.
After an update, you should be able to revert to a previous version if that works. I'm not sure if Valve prefers it, but it might mean you can't play MM on an older release. Give it a shot.