Z3TA+2 asking for registration every time - uninstall of X1 to blame?

This synth was included with the X1 Production Suite which I originally bought. I uninstalled X1 at some point after installing X2 and had no problems with Z3TA+2.  Recently however after following Cake's online steps to do a clean uninstall (deleting registry keys etc), the synth is now asking for a registration code. I can provide it, but the problem is that it doesn't "take," i.e. the registration dialog pops up every time I open a new instance of it. I've tried running in standalone as administrator but that doesn't help either. I've also tried disabling antivirus etc. 
 
Support hasn't been able to rectify the problem yet...last I heard from them, they asked me whether I'd run any registry cleans recently. I'm thinking that my deletion of X1 registry keys has been to blame and thinking about reinstalling X1. However, I'd like to know: will reinstalling X1 screw with my installations of X2 or X3 at all, with regard to any of the shared utilities? 

Z3ta+2 was not a separate install during your X1 install?
 

i wish I had something  for you.  I bought X1 and z3ta+2 separately.  You would think the production suite was simply seperate packages combined and that uninstalling one would not affect the other.  Maybe do a sweep for dupe files and make sure you don't have a partial install of z3ta+2 somewhere .  I had an issue like that with a Sonar plugin that turned out to be a conflict with a previous version still on my system.

Never heard of anyone installing an older version of Sonar with newer versions of Sonar installed.
 
I didn't realize this but I still have X1 32b and 64b still on my machine!
 
Did Zeta +2 come with X1? I got it when it was on sale, so I don't remember if it was a freebie at one time.