There’s no reset. That’s on purpose.
Your data is encrypted with your password and I never have a copy — that’s what keeps me (and everyone else) out of it. The flip side is that nobody can recover it, including me.
Before giving up: typos, caps lock, and phone autocorrect cause most of these. Try again slowly with the show-password toggle on.
If it’s really gone: text Nico. Your old data gets deleted and you start fresh — same app idea, empty history.