Thank you for your input. It appears to be the answer.
I can not modify the file in Capture One Pro either.
I have right clicked on the file in View NX2 and the It allows me to protect the file with the key symbol, but I can not unprotect it.
Do you know of a way to unprotect these files so the can be further modified using another photo modifying system?
|IMG_8168ABCD by citori525|
|McKinley meadow by TimR32225|
from Natural meadows
|Flare-well to a Classic Flying Machine by cjf2|
from Flying Machines
|_DSC2146 by jerste|
from Helios-44 II
|Leopoldsteinersee by RaCor|
from Landscape - Colour #3