If you can't access the main menu and you've cleared the cache then unfortunately there's nothing left but to wait for an update to resolve the problem. It looks similar to a problem a bug a few versions back and the dev is quite active so hopefully you'll see the update in the coming days.
EDIT: Well, technically there is one option but I don't recommend it since you will lose some data. But it would probably fix the problem. But so can an update.