When Application Launcher distributes an application to a workstation, it creates a NAL cache directory (typically, c:\nalcache) on the workstation. The NAL cache directory contains the information required to successfully uninstall the application.
However, when Application Launcher distributes an application to a terminal server, it does not create a NAL cache directory, which means that it does not have the information to uninstall the application from the terminal server. Therefore, you cannot use Application Launcher to uninstall an application that it has installed to a terminal server. If you no longer want the application on the terminal server, you must manually uninstall it.