The Plugin Manager (accessible in PARTproject under Extras → Configure additional modules ) enables the activation and deactivation of various plugins in Additional modules - Menu, Output - Context menu [Output - context menu], Automation - Context menu [Automation - context menu] and Classifications. If you cannot find one of the plugins, it is quite possible that it has been deactivated via the Plugin Manager.
Further information can be found in the chapter Section 5.6.4.4, “ Configure additional modules ” in eCATALOG 3Dfindit.