No, not at all. I had installed FSDT products with FSX, on its own dedicated drive. Recently installed P3D on its own dedicated drive and then installed the FSDT stuff onto the new P3D drive. The sim recognizes all the FSDT airports, as did FSX for the several years I have been running that sim. The only aspect of FSDT products that doesn't work is the FSDT updater. Even the stand alone Addon Manager installer eventually issues the same, or similar, error message as when trying to run the Updater.