Nikon View NX2 NEF Defaults???

Now All!

How can I restore a NEF file to it's original condition in View NX2? I thought RAW editing was supposed to be "non destructive" but once you start editing in NX2, you need to save the changes before you can process to a JPEG and theose changes are saved directly to the NEF File.

At the moment whilst i am using NX2, i am copying the NEF file first and working from that one so i still have the original NEF archived off.

Any advice would be great!