Hello Bryan
Please start the installer once more and hit the "Uninstall" button again. Even it is prompts an error, exit the installer and start it again. Before proceeding with the installation again, make sure you have you license reactivated by visiting
http://www.simdesigngroup.com/shop/index.php?main_page=LIC_ACT_EMAIL_VERI. Once you have completed the reactivation process, you may proceed with the installation exactly as you did the first time you did it.
This should do. If you face any more issue please reply to this topic or mail us at
support@simdesigngroup.com . If this procedure does work for you, please also post a reply here so that we can close this case.
We are waiting to see how things worked for you