Panning and dynamic lighting issues

Good day Kevin,

I have noticed lately that while panning inside or outside of the aircraft causes the dynamic  lighting to flicker on and off.  This happens with landing lights, VC lighting and dynamic lighting at the airports.  Should " Running your simulator with a clean directory configuration"  help fix this?  I never deleted this before.  I take it is the same as the shaders and the p3d.cfg in that on restart it rebuilds its self.  And if I do delete, do I need to do anything else like reinstall the oldprop effects?

Thanks

Keino