I am not new to FSX, but have not been using it for quite a while. I have been trying unsuccessfully to use Add-On scenery, e.g, Ray Smith's Tampa International, Orlando Int'l, EWR and so forth. No matter what I do, it does not pick up the added scenery. I've uninstalled and reinstalled FSX thinking that maybe a critical file was corrupted, but nothing works. I am running Windows 10. Any suggestions?