I just bought X3, it still has compatibility problems with Vista though not near as bad as PI10. I had major problems with importing my presets. It was hopeless untill I opened it with "run as admimistrator". Right click on program icon and choose run as administrator. That solved the problem for me.
Also if you right click on "Gallery 1" under "My Gallery" and choose "New Group" you can add descriptive folders for your presets.