I've basically done the same thing.. I purchased Music Creator Touch, ( initially I was messing around with Music Maker in Windows 8 it's a free download in the MS windows metro shop and thought this is cool, so decided to look for a better DAW ad ended on deciding with Music Creator) and then later upgraded to X2 Studio and then X3 Studio and now X3 Producer...
I uninstalled Music Creator before installing X2 Studio, can I selectively install the VST plug-ins, instruments and stuff from Creator without installing Music Creator program and use them in X3 Producer?