I would prefer that when presenting pictures of the downloadable aircrafts, more pictures of interior are shown. Liveries are ok and interesting, but the “clickables” are as desirable as the exterior.
Keep in mind that P3D V4 loads it's add-ons through a folder in your documents folder. Lockheed did this in case you had to reload the program, you would not lose your add-on files and have to start over. Sometimes , the installer may not activate your download. Go to your documents and locate the file marked ( Prepard 3D v4 Add-ons " and open it. You should have the aircraft folder in there. Copy it and paste it to your Airplanes folder located in sim objects. It should be present as an aircraft within the program