I'm sorry for the inconvenience. The download zip does have a bit different structure than what was explained on the product page. I've updated the page to reflect the correct structure.
The zip file contains a folder for each supported database platforms. You need to copy the contents of one of these folders to the root of your website. So, for instance, if you're running MSSQL, you will copy the contents of the 'mssql' folder to the root of your website.
I hope this helps.