Many Many thanks to @skysurfer and @GSalden.
Uninstall PTA
Uninstall P3Dv4 client
Reinstall P3Dv4 client
Reinstall PTA
Use a PTA preset that is compatible with your sim
...worked for me...😀
hi guys
same problem. didn't find something in the forum and have no idea.
Actually, i use P3D v4.5 and ActiveSky for P3dv4.
tried to delete the shaders folder and the prepar3d.cfg - no results - problem still exists...