Lemme try it.
Hm. I tried “New Extension Project / From Install Extension” and selected Disappearing Doors (github.com/erkyrath/i7-exts/blo … 0Doors.i7x).
I wound up with “Test All” and the one example (“Prisoner of La-Z-Enda”) in the drop-down menu. I could then hit Test, or (when the example was selected) Go.
So it sounds like the problem is that it’s not recognizing your examples.