I think you were a bit confused
1) We can't help you cause most of us don't have UBBx, and if you want us to check your account for you I don't think you'll find many people that are gonna do it for free.
2) You don't need to keep that account, the worst that can happen is a few broken smilies.
3) I'm sure the convertion didn't cost $599, maybe they told you to upgrade to UBB.class with lifelong memberlist access for $599 or something. (I don't remember whether it's $599 or $699)