little problem with idle power

I just downloaded a freeware POSKY CRJ 200.
The bird is fantanstic but it has a little annoying problem: at idle the plane accelerates to 40 knots unless I hit the brakes from time to time during taxing.
No other plane does that.
It can't be my throttle since all other planes are doing fine and it seems that only this one is having a problem.
My guess is that the idle power is too high ... is there a way to reduce it? Manipulating the aircraft.cfg perhaps?
I generally tweak the aircraft.cfg successfully but I have never done something like this so I don't know if it's possible and I couldn't find much searching around.
Thank you!
The bird is fantanstic but it has a little annoying problem: at idle the plane accelerates to 40 knots unless I hit the brakes from time to time during taxing.
No other plane does that.
It can't be my throttle since all other planes are doing fine and it seems that only this one is having a problem.
My guess is that the idle power is too high ... is there a way to reduce it? Manipulating the aircraft.cfg perhaps?
I generally tweak the aircraft.cfg successfully but I have never done something like this so I don't know if it's possible and I couldn't find much searching around.
Thank you!