I need help loading presets into Lightroom Classic

Dear Adobe Community,

I am trying to load presets into Lightroom Classic and am having trouble. I will admit that this may be due to two factors so I will attempt to describe both of them as quickly as possible.

First of all, it could be that I may not be doing the unzipping process correctly which is something that I know very little about and have done very little with over the years. The presets I am trying to load are from Kelvin Designs and they attach a pdf file with each preset that tells you in a few steps how to load these, but I have followed these steps and I have not been successful. Those steps are these:

1) Download the file (files which are zip files)
2) Unzip the file
3) Open Lightroom Classic
4) Go to the Develop page and click on the plus sign for presents.
5) Select the file and then click on import.

I have done this and each time I get an error message telling me that there were no zip files to load.

Regarding this my first question is if I unzipped the file first. So I went back to the actual downloaded file and left clicked on it and all the individual files opened up. I assume that this means that the files are unzipped?

The next thing that I did was to use my computer and left click on the downloaded file and then scroll down to and select "export all." Once again, all of the individual files opened up.

The third thing that I did was to use WinZip.

I went to Lightroom Classic each time and followed the procedure sent by Kelvin Designs but nothing worked.

What also added to my confusion is that when I clicked on the plus sign in the Develop page for the presets it didn't give me the option of selecting the actual file that contains the presets within that particular download. Also the Kelvin designs pdf file states that once the file is unzipped it will show one of the files with the name of the file followed by stating that it is the xmp. files which my computer is not showing.

I hope that this makes sense and if anyone wants more information such as screen shots of what I am seeing please let me know.

I would appreciate any help.