From my place, it's been hit & miss.
Took the Otter (6Gb
) out for a while last night, and although it was slow to load on my system, once it got going, it seemed to work fine.
It said it would install FSX + FSXSE side by side, but I had to do it twice to get it into each.
The Vought Corsair is supposed to be for P3D, and though it said it installed to FSX, it doesn't appear in FSX.
The Twin Comanche installed, and is in the file list, but doesn't appear in FSX
It also was named MV Twinkie, making it harder to locate. It's shown to be for FSX and P3D, but the installation box only offers P3D
The Cessna Bobcat failed to install about 20+ panel sounds, but otherwise appears to fly OK. it's POSSIBLE that the panel sounds relate to the weather radar/GPS options, which I MAY not have ticked in the setup, and were thus deemed not needed.
Mixed reaction, good luck everybody.
I'm going to delve into it more.
EDIT
The Comanche actually does appear in the list of aircraft when selecting "Change Aircraft". Despite the splashscreen title, and the "MV Twinkie" mentioned above, it is listed as "Piper Piston Twin." Why? You tell me.
Anyway, TOUGH! Because when selected, I'm told that it cannot be displayed. Then FSX crashes and re-starts.
2nd EDIT
Told Malwarebytes not to interfere with the air or cfg files for the Comanche, made no difference.