Same here with the editor.
What I'm saying is this: in the file bar, go to the 'View' menu. In there is the option 'Clean map'. If there is a tick next to where it is written, all overlays in the editor become hidden. If it is ticked, if you select it, it will become unticked and all overlays will reappear. If it is not ticked, I don't know whats happened to your editor.