OK, I found a small error in my 4.10 game version.
The airplane was not loading for it to fly.
The game said the error was it needed the WWI_Engin_EM file. It was missing this WW1 engine file.
So I copied the old airplane version WW1-engine file and placed it inside this new airplane folder.
My 4.10 game now flies this new airplane.
Take note - This is NOT the airplanes FM file, do NOT change that ----> it is the
WW1-Engine mod-file that was missing. Named
WWI_Engin_EMif you have this same problem as me - here is the file you need . . . .
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DOWNLOAD --->
https://www.mediafire.com/download/dcat9rvafhsey94/00_Junkers+F.13_v1.2b.7zJust copy and paste this file into your new airplane folder.
This file does not come inside this new airplane package.~~~~~~~~~~~~~~~~/~~/~~~~~~~~~~~~~~~~~~~~~~~~
.