Try entering it again.
Try emailing support. If that doesn't work, have you tried reinstalling?
I've been waiting nearly a month for a reply from support :c
Does it say "Auth DB Error: ID not found" or something like that?
why don't you fly over to their HQ and ask them for help in person
Please tell me. If this is true, then your key has been hijacked, and Badspot revoked it.