No airport beacons showing up anywhere

After finding no help in the archives concerning airport beacons, I gotta ask. Why don't I have any beacons at any airports?And when I manually place a beacon and try to save it (using builtin scenery editor), it's gone when I run Fly again. (Also can't move and save objects that are appearing, such as the bridges around San Francisco that are just slightly out of place).Any advice? Would reinstalling help? I've updated Fly over the years through the original TRI patches to .250, little by little.It'd be nice to have a more realistic beacon model, too; something like a single steel pole. And of course, if beacons could be visible from 20 miles out...!