Hi after making a few adjustments to my spirit pro and getting heli flying good. I now have the problem that the rudder is to sensitive. What setting do I reduce to slow it down

You reduce the sensitivity of the Rudder stick at center by adding rudder expo on your transmiter. Also, you want to adjust the maximum Rudder Rotation Speed to your liking on the Sensor tab.

I was lead to believe not to use the expo on flybarless systems?

Trim is what you shouldn’t use. Expo is fine. I run 20% on cyclic and 50% on rudder. Makes things softer/more precise around center. But you should also look at you rudder or yaw rate and be happy with your maximum rotation rate.