Hi Mala,

re:
> Do the file folders perhaps need to be unzipped:

The answer is in the first 2 sentences of the FAQ, please read it:

FAQ #1, How to install a plug-in script.

Also it can be helpful if you change a Windows setting so it will not hide the file extensions:
https://www.howtogeek.com/205086/beginner-how-to-make-windows-show-file-extensions/

- Michael