Don't look at the About Poser for your SN, look at registration, that will contain the full SN. Poser 11.2 will uninstall any previous version you have. I have done it several times as an early-adopter and each time I had no issues. If your runtimes did not appear after installation, you may have not selected keep preferences which retain all the settings you manually established. There is also a script in Poser that searches and imports all runtimes on your drive.