Close Designer.
Uninstall Designer according to the operating system:
Navigate to the directory containing the uninstallation script, by default <installation_directory>/designer/UninstallDesigner/Uninstall Designer for Identity Manager.
To execute the script, enter ./Uninstall\ Designer\ for\ Identity\ Manager.
Use the Control Panel utility for adding and removing programs. For example, on Windows Server 2008, click Programs and Features. Right-click Designer for Identity Manager, then click Uninstall.