Hi Frank.
One thing I found disappointing with CNX-D is that it doesn't do colour reversal very well.
I'm not sure what's missing, or why I can't get it to work, but CNX2 was close to perfect, for my purposes, and importantly easy to implement.
Someone gave me the tip to invert the levels/curves on an image(black to white and white to black) which works a treat in CNX2, then a bit of tweaking here and there(WB and exposure compensation .. etc) .. all on the raw file.
Was hoping for a better featured negative capture tool on the D850 till it came to be that it's only jpg capture.
So far I've used my D300 and then my D800E for the negatives I've digitized, and using CNX2 was a breeze to convert. Used a batch process to convert many in one process .. then tweaked each individual image on an as needed basis.