The title of this thread is "Microsoft Flight" yet teheran link is clearly to a different simulator. Quite misleading and looks like spam almost.

Also, Pro Flight Simulator is an unauthorized repackage and resell of the open source, General Public License, FlightGear project.

Having said that, Microsoft Flight came out and is free to play, and you can buy addons. Unfortunately, I found it too much like an arcade game.

I'm sticking with FSX and XPlane (Xplane 10 just came out but too expensive for me so I'm sticking with Xplane 9 for now)

Here is the actual link for Microsoft Flight fr those who want to try since it is free
http://www.microsoft.com/games/flight/