Lightroom 5.2 to 5.7 - How to Update - Broken/Non Existent Links

Greetings,

I have a physical disc copy of "Adobe Photoshop Lightroom 5" and am currently operating with version 5.2. 

Everything was fine with version 5.2 until I recently tried to edit RAW files from my newly purchased Nikon D610.

Apparently, version 5.2 does not recognize RAW files from the Nikon D610.

Hoping for an easy fix, I went under the "Help" tab and selected "Check for Updates" within the software.

The resultling link has led me down a rabbit hole to other links across Adobe's online presence with no solution to my problem. 

I know I'm not the first person to have this issue nor the first to post about it, however, I figured I'd give it a try. 

Please help if you can and thank you.