I installed Addit Pro. Placed an aircraft add-on download in a folder labeled FSX Downloads, which contains a folder for the aircraft . Addit Pro Wizard was supposed to install the aircraft in FSX. I don't know what I would have done wrong, but the aircraft is not there. Any suggestions? Thank you.
Why not try the old fashion way. This is the way that I first learned and have been doing it ever since.
https://forum.flyawaysimulation.com/forum/topic/33358/how-to-install-aircraft-in-fsx/