Can't open this CF in 3DM (4.43 & 4.83)

Hi, I cannot open this CF in either of the 3DM releases.
https://www.mediafire.com/file/ct1i3nqv ... D.rar/file

Any ideas?

It's probably saved with RedMC (maybe a HD version also). You can open it that way, but I think that way you can edit texture only, not the model itself.

Brilliant, thanks!