I’ve never owned a Nikon camera so I’ve never needed this codec. It’s helpful the Nikon provides one, but a bit worrisome that the last problem the fixed was a security related buffer overflow with related CVE entry. “Fixed a vulnerability related to buffer overrun during file loading (CVE-2024-8025)”

If you need to open NEF Nikon raw image files, here is the answer…

https://downloadcenter.nikonimglib.com/en/download/sw/259.html