Remove everything like, uninstall previous version, link the projects to another folder. run CC cleaner with temp files and registry cleaner.
Restart and Download a fresh copy to install, use the same key it will work.
If not contact the support desk, they will resolve in couple of hours.
For licensing questions, I recommend that you contact our Ready! API Support Team - http://support.smartbear.com/product-list/. They will assist you.