If you use Windows XP or below, navigate to Start > Control Panel > Add or Remove Programs. In the Currently installed programs box, click on the ASG Site Manager program and then click Remove.
If you have Windows Vista or above, you need to go to Start > Control Panel > Programs > Programs and Features. Select the ASG Site Manager application and click on Uninstall.
After that, run a registry cleaner from Software Informer database to make sure that there are no leftover registry keys in your system and reinstall the application. If it doesn't work, use the contact form from the official web page to get in touch with the ASG Support team.