You are right in that the preferences I had put in including the printer & paper had gone awol, probably I had set them in the session before I crashed it. Unfortunately restoring them doesn't improve the print quality. Nikon must have the printer data wrong, both printable area and colour profile, so it is 'save as' and print from DPP which has it right as well as more layout options.

Since (a) mastering the colour management using DPP (b) joining a local camera club, I do a lot of printing now....in fact more robins and saints waiting for implanting on Christmas cards this very minute