razorhead wrote on Jan 2^nd, 2018 at 4:49pm:

I know PFPX should be placed here: D:\P3Dv4\Captain_Sim\navigation\routes But not sure what format it should be. pl or rt files?

I tried that and it came up with Error, after Error as waypoint names, so I reverted to using the FSPlans option lower right, and works perfectly, ofcourse, after I have exported it for other planes too, as well as P3D.