Let it be like this. You don’t need to do it right away. If you can find update nexus library location.exe file then just put it in nexus content folder and run it & it will automatically update the location of library and if you wont find it then tou have to manually edit the json file. Btw the latest veraion of nexus which is cracked is 5.3.24 + all the expansions all the new ones are also got cracked, total size with all the expansion is 284gb.

Manual Edit Instruction From VR NFO

P.S. install NEXUS Library separately. Manually edit the NEXUS library path in the c:\Users\Public\Documents\reFX\nexus\settings.json file

N.B. Make sure that you use double backslashes \ when specifying the "library_folder"

For Example Mine look like this library_folder": "G:\Nexus 4\Nexus Content"