Whoops sorry, haven't tried that yet. It's persisting but maybe I will try reinstalling. Will this get rid of all my sick replays (not that I'm ever going to watch most of them again) and workshop stuff, though?
I've noticed it only ever crashes on the loading screen just before a match. The Windows cursor always appears about 2 secs before the game screen 'vanishes' and leaves me back on the desktop, with no error messages.
It's doubly annoying because RL then usually has to sync up, and if I try to relaunch RL before it has synced, it won't start at all (even after it's finished syncing) and I have to restart Steam, too.