Managing Plug-Ins Choose the Options command from the Service menu. Go to the Plug-Ins tab at the appeared dialog box. Installing a Plug-In Click the Add button, select a library with a Help Development Studio plug-in and click Open. Uninstalling a Plug-In Select the plug-in you want to uninstall and click the Remove button. Editing Settings of a Plug-In Select the plug-in whose settings you want to edit and click the Settings buttons. If the Settings button is unavailable, the selected plug-in library does not provide any Settings.