I tried to log into HB and now I constantly get this error : You have entered an Invalid Product Key. If you are trying to log in with an username and password, please check your registered email address to obtain the key that is created instead of your old shop key. Yet I check my email and see no evidence of anything related... What is going on?
Check buddyauth. There has been an announcement about it for a while. http://www.thebuddyforum.com/buddy-bots/announcements/86476-username-based-login-disabled-old-shop-users-hb.html