Unfortunately, I don't think there's an easy or simple way to do this. Many of the preference files are still the same, but not all of them. You are welcome to try it out (it certainly won't irreversibly break the simulator).
The keys preferences are still mostly the same so that one would probably transfer fine. Rendering settings would not, however, because of how much the UI controlling that has changed. Joystick settings probably wouldn't transfer either, because calibration and settings have been broken out into separate pref files.