Will not restore previous subscription – Bass Player+ Review

Had a subscription to the old app, and all was good. Now, the new app asks for my username and password. Huh? Aren't subscriptions managed by iTunes? Why do they need my account? What's going to happen to my previous purchases? I tried to retrieve password with every email address i have and nothing was recognized. Tried 'restoring purchases' on the info screen. That asked for my iTunes password, then proceeded to do nothing. I am really regretting going digital, as this is the biggest fear I had.
Review by $19.95 on Bass Player+.