The files are already set-up to go where it needs to, but just in case download it manually and keep a back up of the two files.
since nemesis engine will overwrite them with a broken one.

this is for skyrim Se/Ae version of the Do not use this on LE unless you want your game to throw a fit.

try this if your using skysa, since this one fixed a skysa problem with the animation stopping at the 3rd attack.
and DO NOT USE BOTH use ONLY ONE of the Files.

SE/AE version of the animationdatasinglefile.txt
DO NOT USE THIS ON LEGENDARY EDITION!