When I uninstall Outlook connector, it says it was completely uninstalled and is removed from the Programs list in Windows. However when I attempt to reinstall, it tells me it is upgrading from an older version.

Version I'm upgrading to is 5.0.18. Upgrading from 5.0.9. Windows XP Pro SP3 is the OS.

Is there a tool that can perform a clean uninstall? Or are there files and registry keys that I can delete?