I was able to follow the instructions from the other thread, and just copied the json file to my saved scenes directory and open it with the Open Scene button, not the all scene browser button, but the one just to the left of it. It opened very dark due to there being no lights. The other thread mentioned merge loading a scene with 3 lights to fix that, but what I ended up doing was just going into edit mode, picking the root person, and then saved an appearance preset from there, which I could then load up into another default scene to work on it.