Enlightenment E20: how to remove desktop gadget?

I try E20 DE. Mouse click on desktop calls the menu -> Main -> Desktop -> + Add Gadgets To Desktop. Then I click on Thermal gadget and click on desktop. The problem is that I can't remove it from the desktop. I can't do anything with this gadget. By the way, there is another one option to add a gadgets on a desktop: Main -> Desktop -> Change Gadgets. These gadgets may be removed.