Upload & Sell: On
The "bridge" is setting up your Options in View NX2 to specify "Open With Application" programs. When you have both View NX2 and Capture NX2 installed it has a default parameter built in to open with Capture NX2 when you right click on the image or thumbnail. But, you can add CS5, CS6, Lightroom or whatever program you would like to the list.
As a practical matter I have Capture NX2 on all my computers and I believe it's really looking at how many are open at the same time, which is different than looking at machines registered.
Once you have made raw adjustments, or even to jpegs with Capture NX2, the thumbnails will show an icon (like the control point sliders) letting you know that you have worked on the file. That is not true with ACR, or Lightroom. Although you may have made raw adjustments, View NX2 will never let you know they were done. And sometime, I have lost my raw adjustments under ACR when I open with Capture NX2. Not sure why. Just a small bug.