Thanks, Karel.

I'm hoping the requested plugin will see that there's no room and ask which one (Bookmarks or Contacts) I wanna get rid of. I think GPE-Contacts just installs inside the App Launcher (Extras folder by default).

BTW I think the proper terminology is Navigator plugin, not Navigator app, so I'm gonna edit this thread. Searching in an xterm environment, we can find plugins.conf in a few folders. Also note that later(?) versions of the OS added functionality to the Task Navigator control panel...