air's adl.exe

When we open the air app the adl.exe get executed and runs in background.
I was trying to create multiple windows and playing with its visibility and close event.

When one window is made invisible without closing it.There is no way to open the
window again..(because its was not closed , just made invisible.)

If you are facing the problem like this.. while development..DO NOT PANIC(As I did).
Closing of flexbuilder or anything else wont help..
Just go to the task manager and end the process "adl.exe"
I am wondering , what is the long form on adl??