This message being transferred to main forum from a private message from KDN to assist others who may have the same issue --
KDN: I managed to get flight Keeper working on my P3Dv4 system, it wasn't easy, let me you if you want me to share the fix with you
KDN: Why don't you flick me your ini files, I have it fully working over here,I'll try and remember what bits I had to add.
Me: I sent my FSUIPC.ini file and a list of the files in my P3D v4 modules folder
KDN: I think we can get this fixed, lets have a teamviewer session, I need to see a few of the fsuipc and system logs as we open prepar3d. I went through the same process on my system it took me a long time but now I know what I am looking for shouldn't take more than 10 minutes to have it working.