A3: The unclog button isn't available in food menu

This fix is for the Alpha Three model only.

If you're not seeing an "unclog" button in the food menu, just do a quick update. Go ahead and open up the factory menu and selecting "UPD​."

To open the factory menu, your Toybox from behind the printer and plug it back in. While the screen is either blinking (newer models) or booting (older models), press the corners in the order shown below (top left - top right - bottom right - bottom left).
 

The blinking and booting screens only last for a few seconds, so you must act fast. For the newer Toybox models, a red circle will appear if the corner was pressed correctly. Apply a fair amount of pressure, and be sure to press into each corner.

A menu will appear. Select "UPD." 

After updating, the "unclog" button will appear in the food menu.