Akira, were you able to recover any lost images through the use of third-party recovery software, or similar solution? (I don't even know what I'm implying by "similar". Prayer or a smudge pot of burning sage, perhaps.)
This thread is timely as I had put it to mind to do some experimenting with NX-D tomorrow, or soon thereafter. Thank goodness for insomnia, or I might have never signed-on and discovered this thread in time to avert a possible disaster. I'm surprised Nikon hadn't sent out a warning, to those of us subscribing to their mailing/messaging service. But before I start accusing anyone of anything, let me be certain first that I hadn't disabled or unsubscribed from the service.