It's not too brilliant in terms of nav software for FSX (as far as I am aware, I should hasten to add). Some of us ex. FSNav users have gone to FS Build (it works, but TBH it's a little bloody confusing), some have gone to that other one mentioned elsewhere in the forums that I'll be blowed if I can remember it's name (I'll search and mod this post) Flightsim Commander and then there's those of us that I like to think of as the hard core that just use Route Finder and the excuse for navigation and route planning inside FSX/whatever our chosen aircraft allows us.