"Enter password to decrypt account data" - nothing works

[GeorgeSpelvin]

Sorry if this makes me look like an idiot but I haven't used the extension in a while and now I'm suddenly confronted with a login that I don't think I've seen before. I've tried the set of usual passwords and their special-char variations but nothing is working. My only option seems to be to do a complete reset. Is there no way to workaround this at all?