Okay. To find your FS9.cfg, or anything, can be done by "left clicking" your "start" icon at the lower left corner of your screen. Then "left click" on "Search". In this case, we are looking for FS9.cfg or Scenery.cfg. Regardless of other settings, you will be told where the file is located. Go to that location and back up your FS9.cfg (FS9.cfg.bak) so the a new one can be built, or install the virgin scenery.cfg (after renaming the old one as suggested, .bak) so nicely supplied by Wild Bill, and see what happens.
Will give this a try before the wrecking ball comes out. Unfortunately, busy work week. Might not get to try until later in the weekend.