This tool opens the Plug-ins form, where you can register a plug-in module or execute a plug-in tool.
The Plug-in Manager is only intended to be used by people developing automation tools as plug-ins (as opposed to scripts or macros).
Related topics:
Registering and Unregistering plug-ins will require Impact to be started with elevated privileges, i.e. 'Run as administrator' since plug-in registration will make both registry and file-system changes.