D2 Nevendaar Rebalanced 1.0 file

If there are any issues (ex: your game will not start), try restoring your backed up files, and run the game again.
If the issue persists, that means that either the issue is not coming from the mod.
If the game works fine without this mod, it may be that D2 is having a fit (it does that) so try double-checking and overwriting the files again.