Ouch.
OOOOOUUUUUCHHHH.
Oh my god i’m so sorry 
That’s a nightmare come true for every digital security savvy person.
I guess there’s no point in saying that this could’ve been avoided in so many different ways and you have managed to drive into a single power pole on the whole field.
That’s very odd of Proton to log you out from everywhere just like that. Did you manage to find out why they did?
Everyone, for the love of god, please, do not encrypt your password manager’s database (or other means of getting into it) with a password that you don’t know or don’t have a reliable backup of at hand.