NHF – new heroes for Heroes V 3.1.

There is no patch; the game initially runs version 3.1, and it's a licensed disc from Nival.

The game was never sold separately on a disc with version 3.1; only version 3.0 was available for Tribes of the East.
Just install the patch.
All the patches are available in the site's library: /files/10078/>
Don't confuse the patch versions for Buky and 1C. You need to download different files for them.