The path to scenery.cfg was already set to c:\ProgramData\LockheedMartin\Prepar3d v4\
But after deleting the path setting, it found all the scenerys and everything is now working.

Thank's for the support! :)

"Display Prepared3D Data" is selected.
LogFile is attatched.

After a clean install and building of the p3d v4 nav database, nothing is shown on the map (except the map).
Only Vatsim data is shown, no airports, airspace, ILS (except EETN!) and so on.