hello
you may be missing these files and maybe more from the Alderney ESI pack ES-3D_Library.esi
HS_Rural_01.dds
HS_Rural_01LM.dds
the .esi folders can be unpacked using WinRar
The textures need to be in the Prepar3d / texture folder
There are a number of folder from the .esi zip folders that need to unpack to the prepar3d
corresponding folders (effects textures ect)
I am running p3d v3.1 and have a second set of folders separate drive from p3d and linked via there cfg files as described on there website
I was able to upgrade from v3 with a full install with no problems.
I hope tis is of help
regards