Removing the Elements background/desktop/workspace/pasteboard?

In previous versions of Elements, it was possible to set the gray background/desktop/workspace/pasteboard/whatever so that it did not appear when the last image was closed. This was done in Preferences.

However, I have looked up and down preferences in Elements 2020 and I have not found it.

I have no use for this workspace to be showing when there is no image open. It must either be closed when closing the last image or I must actively use the app switcher to switch to another app, rather than just clicking on the Mac desktop. When I restart my Mac after Elements has been left running, the first thing I seee is the empty Elements workspace. Pointless.

How can I set this so that the workspace does not appear when the last image is closed?