A portable copy of Blender 2.83 (2020 release) with an updated NIF tools plugin, and Python libraries already installed. just unzip the folder, and click on the Blender.exe you see inside. The portable configuration means no need to install it on your PC; all files needed are self contained!
File is currently hosted offsite, download link below:
Blender license: https://download.blender.org/release/GPL3-license.txt