Can't find my Add-on Comment Script

Hi, I onstalled the Add-On Comment Script.

I read the instructions : If it says successful, please read the ‘Where to Find it’ tab on the add-on homepage (click on Add-on name) which will tell you where you can find the product after it has been installed

Now in where to find it, it says : Using this script is very easy.
Download the zip file, extract the files (.php, .css, etc) you just need to upload the files you receive inside a directory then in any of the pages on site include the comments script:

Well where exactly do I download the zip files ?  It doesn't say.

Thanks if you can provide me with better instructions !