Scenery Question

While checking FS9 for increasing and finding out what the frame rate impact would have if removing the traffic.bgl installed by Ultimate Traffic, I discovered a directory in FS9 called "Scenedb". I thought that FS9 did not install a "Scenedb" folder as in previous FS2002. However, in this foler there is an "afdfiles/scenery" folder with camafd.bgl, usscaf01.bgl thru usscaf06.bgl and usswaf05.bgl files inside. Also there is an "ATC/Scenery" folder inside the "Scenedb" with a "traffic.bgl" file in it. I have several addons installed in FS9 and would hate to uninstall any to see what might have created this "scendb" folder. Would anyone might know offhand which addon might have created this folder. I don't think I want more than one active "traffic.bgl" file in FS9. Also, there is not any reference to the "scenedb" in my FS9 scenery.cfg file.Thanks,Wilbert