Maybe now they can shift to more ethical business models?

You can’t honestly expect that?

NPCs don’t mind

For self hosting?

Looks like the author is still active and looking for funding: https://github.com/TachibanaGeneralLaboratories/download-navi

But development seems to have stopped indeed. There is a fork, with new developers, that is actively being worked on: https://github.com/Davilarek/download-navi

GIMP is such a workhorse and a pleasure to work with.