Uninstall

Use Control Panel, Programs and Features, select the UnForm 10.1 Server, and click Uninstall.

This will attempt to stop the server, uninstall the service, remove Start menu entries, and finally remove most directories and files from the install directory.  Certain data files, such as archive libraries stored in  the "arc" folder, are left behind to avoid accidental deletion of potentially valuable data.  These files can be removed manually when ready.