I just got a message from Jim Christian, the maker of Picture Code (=Photo Ninja)
"If you shoot in either 12-bit lossless compressed or 14-bit lossless compressed, PN can open the images. For the other formats (lossy compressed or uncompressed), you can convert to DNG and PN can work with that. "
A complete new version is coming.
"I've been slow to address these in V1.3.X because I'm completely immersed in the V2.0 project. I actually have all the formats for the Z6/Z7 working in the V2.0 code base but can't easily migrate it to the V1.X code base."