I’m probably an idiot and missing something obvious here. However:
I’ve exported a project as JSON. (I know the documentation is out-of-date but that’s fine: much of the format is pretty self-evident and the bulk changes I want to make are just connected to label placements and the like, where the meaning of the “x” and “y” keys is clear.)
Now I can’t see where in the interface I can re-import it (either as a new project, or overwriting an existing one) to get my edited schematic and PCB back into Upverter.