Hey great simulator for low end PCs.. I only have a intel GMA and I can use 3 of the tracks with very good frame rates.. (Tower, Meadow, Desert) Unfortunately can't use the other 3 (Island, Playground Carpark), as the frame rates are a bit suspect < 30fps.)
I assume this is still selling well due to it being the only multi-copter simulator to be able to run on inexpensive laptops and old PCs. In this area it has no competition since all the others are aimed at high end equipment. There's still plenty of money to be made here.
So how about it, since people are still supporting your product and buying fpv freerider, why not add a few more tracks, or even an editor for low end PCs?