unICA your Workstation before installing a new XenApp Client!
David Paoleschi sent this terminator program over to me.
This little app goes through your entire registry looking for any products released by Citrix and uninstalls them! It will not run on Windows Server to prevent accidentally uninstalling XenApp or Presentation Server. It will uninstall the Consoles for these Servers though from your Workstation.
The real goal of the application is to uninstall every ICA client on a workstation prior to installing a new version. This is helpful to avoid ICA client issues when upgrading older clients which do not like to uninstall gracefully sometimes.
UNICA is free tool to download and use.