Yellowstone scenery

How does this "7ip" thing work? I followed the instructions (as far as I can tell), and all I see is a result of "unspecified error" in the 7ip panel.
Flight Simulator and other chat
https://forums.simviation.com/phpBB3/
https://forums.simviation.com/phpBB3/viewtopic.php?f=46&t=159166