I use aivlasoft for several weeks with fsx without any problem. but I just went to P3dv then 4.2 and there start the difficulties.
I launched the provider and of course indicated the way for my p3d. he found all the scenes and then restarted as normally but when I open the file giving access to flight plans, the list of plans is complete but when I open a plan I get the error message wich I joined to my first email. So the solution seems elsewhere.