If you installed using the Eclipse Update Manager from the
update site, you can use the Update Manager to uninstall.
If you installed using the installer, you can uninstall using the Windows standard Add
or Remove Programs utility or double click on the file
called uninstall.jar, located where you installed the
product. The default installation directory is C:\Program
Files\Instantiations\Designer_version. This will bring up
the uninstall wizard.