Installation instructions:

Unzip the files into a dedicated folder on your computer.

Open the "Vizpak SSS" sub folder within the "Vizpak SSS for Blender" folder and copy the file path

Open Blender and go to Edit --> Preferences --> File Paths

Click the plus sign and paste the file path to the "Vizpak SSS" folder

Name the library and save your Blender Preferences.