.DNG files are damaged, can not open. Now what?

I have many files I had converted to .DNG from Nikon .NEF some time ago. When I try to open them now Photoshop says they are damaged. I have tried opening them in other programs (Mac Preview, Graphic Converter) but no luck. Is there anything I can do? I do not have original Nikon .NEF files any more.

If you are using Windows, you should know that Windows keeps "Shadow copies" of files.
The best way to access them is by using "Shadow Explorer" free of charge.
This only applies to files kept on your C or D drives, not SD cards or external drives.
You may even find the old NEFs if you are allowed to go back far enough.
ShadowExplorer.com - About
For Macs, it would be Time Machine.
Hope that helps,
Gene

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