If I visualize an orbital, and then want to visualize another one, I have to remember to first remove the old one as otherwise the new one gets generated additionally to the first one.

Is there a use-case for having more than one orbtial displayed anyway? If not, then the "Generate" button should just remove the current orbital and generate the new one.

If yes, then maybe something like the vibrational frequencies dialog could be used, i.e. having a check box for each orbital.

I now found one can display/hide orbitals by expanding on the molecule and then selecting "Orbitals" - however I don't think this is very discoverable and (at least on my setup) I cannot select them while the Electron Density dialog is open.

At least auto-expanding to the orbital checkboxes in the workplace when orbitals are being generated would help somewhat already I guess.