Well, perhaps it's because I, regarding to FSX, took away the "B:\" in front of the scenery location inside my Scenery Config Editor tool - just in order to make the tool work more smoothly, because ORBX's FTX Central use to mess everything up inside when the "B:\" was present.
Anyway, I'll try and reinstall the scenery files, one by one, through your new installers, as you wrote.
Cheers,
Morten