Could use help installing p3d 5.1 academic please.

[Blind Pilot]

I'd appreicate some help installing P3D v5.1.
I've installed and uninstalled.
I've even repaired sevearl times.
My main issue is that I constantly recive souce not found.
Is there any way of receiving a new zip folder to stress test out?
I can be reached at:
kolesar16417@roadrunner.com
I'm about blue in the face and feel as I've been just going against a brick wall.
Would deeply appreciate any help I can get to figure out what I'm doing wrong when installing p3d 5.1.
Many thanks.
Ron Kolesar a P3D client who needs to see via his ears since his eyes don't work.