Thanks for answering.
I have Central 4.0.16 the latest version. What I do not understand is that I got FranceVFR to work by using the AGX package and put those files in Autogen files next to their Scenery and Texture folders.
So Skiathos should use its custom default.xml and definition files in combination with the default Autogen folder.
Like I wrote nothing has changed in there : there are only default files.
So if FranceVFR is working with custom definition files and Orbx what is different with Skiathos ?
I have read at Avsim that others using Orbx inside P3Dv5 have Skiathos working...
And I have installed Skiathos also in P3Dv4 the XML way without Arno’s merger and with all Orbx and it is working with a custom Autogen folder. AG all over the place.
Skiathos is too beautiful to not see AG.