I purchased the BE-23 Sundowner (as I used to own one) but it will not show up in the list of available aircraft. I placed the 'Beechcraft Sundowner 1.1' folder inside the Aircraft folder (and a few other places) to no avail. Since I see someone mentioning the aircraft in 2020 I would assume it should run with X-Plane 11. I see several startup-xxx files in the folder but nothing happens when executed. Currently running MacOS 11.0 what am I missing????