Matt Laur , Nov 01, 2012; 04:04 p.m.
Never mind View NX2 or Transfer ... can you find the files using the computer's operating system? Are they present both on the card (the NEFs and the JPGs) and in whatever folder you copied them to on the computer? If the files are there but appear unreadable, the View NX2 versioning issue seems like a contender.
What happens when you make a fresh copy of the card's files, in a new folder on your computer, using the file system itself (not Transfer) to copy the files over? Can you then look at the freshly copied NEFs, using View NX2?