edit .air FDE. How to

Hi all. I know I need a program to do this but I cna not find it on this site or any other. Can someone point me in the correct direction?
Flight Simulator and other chat
https://forums.simviation.com/phpBB3/
https://forums.simviation.com/phpBB3/viewtopic.php?f=21&t=62954
I am generally tired of the A321 having very poor handling and speeds. Just wish to make it more realistic. And see what I can do to improve it. I am hoping to become good at FDE editing.
I just got air ed. Just do not know how to work it.
Well my complaints are really as follows about the default A321:
1) Controls feel too light for my liking.
2) Wont come out of a turn easy.
3) Rotates at 100 KIAS even with full load
4) Lands at about 80 KIAS with about 3/4 full load.
5) Seems entirely un realistic from the A321 I flew on in real life.
6) Speedbrakes have too much affect on lift and speed.