I have updated to p3dv4.1 now by updating only the client software.
The update process worked with no issues for me.
I did a short test flight with the Cerasim UH60 Blackhawk in VR.
There are some improvements which makes VR more comfortable, but didn‘t recognize getting better fps....
Please note:
The F1 GTN 750/650 device is not supported yet for v4.1.
F1 is working on v2.04 of the GTN package. This version will then be compatible with p3dv4.1.
I hope they will publish it soon.