This is a remix of a horizontal outlet cover with shelf that was a remix of a vertical outlet cover with shelf. In my remix, I've added a lip to the shelf to prevent things from falling off if clipped in passing. My outlet happens to be at waist height in a high traffic area and so the lip was necessary to prevent outrage in the future.
Go to Extensions > Post Processing > Modify G Code. From the "Post Processing Plugin" window that pops up, select Filament Change from the drop down menu. If option not listed below, leave unchecked:
Very carefully use pliers or snips to rip off all the supports. The print should be rather sturdy so don't worry about breaking it.
The author remixed this model.
Added a lip to the horizontal shelf to prevent items from shifting off.