I'm having difficulty uninstalling Beta 2013. After installing b1 and b2, I wanted to uninstall, and the uninstall kept failing. It leaves just SolidWorks Plastics. So I tried to use Change in the Control Panel instead. I was able to use Change to reinstall b2, but still could not get SolidWorks Plastics 2013 to uninstall properly. Clean installation and uninstallation is a persistent problem and really needs to work more reliably and effectively.