Hi. I believe this may be a wider issue. Pro ATC X is reading the default airport too. The problem appears to be sceneries that are 'greyed out' in the scenery library, as they also do not feature on the scenery.cfg. It is the same for my FSDT sceneries. I assume v4 is installing them differently and albeit v4 reads them correctly, outside programs cannot access them somehow.
Thanks
amyjt