I'm not using g3. The plane I am flying in FMS, I may have the name of it wrong, but it's the one that looks almost like a cessna. I think the issue I am having with it not flying is that the wing doesn't have the right amount of dihedral. This is what's making the rudder almost useless in the sky.

Is there a way to change this within FMS (does it use text files for information regarding the dynamics of the plane) or do I have to use some form of editor?