I'm sure it's obvious to the folks that use this software how to use this download, but can't see anything that indicates how.
Opening the folder in Finder does nothing more than display the contents as shown as above.
There are no other clues, that I can find, on how to start the Getting started tutorial.
To get started, just start watching the first video in the series on the same page you grabbed the file download from. As you progress through the content, the presenter will let you know when you need to bring in the various sample files you downloaded.
Please let me know if I did not understand your question correctly.