Carenado and Alabeo are rather cavalier with some models.
If you look at most of the descriptions for their products you'll find very few if any marked as suitable for P3Dv5.
I tend toward 'experimenting' with them at times and even while the missing airframe skin is annoying the instruments and flight controls compound the felony.
While it happens regularly with many earlier releases it goes feral with not so old subjects like the Hawker Beechcraft H850XP, and much to my annoyance, the Dassault Aviation Falcon 50EX.
When I loaded the Falcon up in P3D.v5 it initially seemed all there, as I flicked through the startup panels I discovered the upper section of the main panel floating at cabin roof height, then it grudgingly started but just sat
there fat and dumb and immobile.
No idea if it works in v.4 as it has been removed due the Graphic Card 'hanging' hassle.
However, the Beech D18S, Fokker 50, SAAB 34, Aerei da Trasporto Regionale A42-500 and A72-500, Embraer EMB-120 Brasilia and SF-340 all worked without any drama, installed straight into the simulator.
It would seem that officially they don't 'do' aircraft for v.5, the line has been drawn at v.4.
Also fine in v.5 are the pair of Shorts.
Frustrating!