If clicking the forgetten password button does not work due to you using an old ass email and you have no idea what your password is, is there anyway to get your AIM password back so you don't have to lose your screenname?

try this one
aim password recovery

If you have it set to save your password, then you can always downgrade to a previous version that shows the pass as ********, then use a box revealer program to get the password.

I have not had any luck with this product whatsoever. I've tried it on the Trillain, AIM and MSN and AIMPR didn't work on any of them.