Unzipping a BVH file

I have been desperately trying to unzip a couple of BVH files so I can animate and asked the WinZip team. They keep sending me tutorials or Knowledge Base files but won’t unzip the specific file I requested.
Blender Artists is my only hope. Here are two of the files:
[Zip file for BVH directories 01-09]
(http://www.mediafire.com/?jajok14comokr2p) (45 MB)
[Zip file for BVH directories 10-14]
(http://www.mediafire.com/?8fe0mzq5c236vje) (89 MB)

How do I unzip them PLEASE?

Use 7-zip. I could extract the first file with it.

So DeepBlender could you post me the unzipped files please??

Could WinZip do it??

DeepBlender, I tried to download 7-Zip. It seems to download but installing is not straightforward.
I was stuck and there are also warnings that the registry may be corrupted !
So I wonder how you did it.
And would you be kind enough to post the unzipped file please??

You have to figure out on your own how to install an application which allows you to unzip the files.

I am trying to color the faces of a cube with different colors.
So I went into Edit mode; selected one face (using B select); opened the Material tab in the Properties panel. Selected new (material/color). Clicked the base color slot in the Principled Shader & picked a color, say green. But when I click to ‘assign’, I expected just the selected face to turn green . Instead the whole cube turns green or else nothing. In render mode whole cube is green.
Question: How to get the color chosen (green) only on the selected face and not on the surface of the whole cube?