To download using My Files:

My Files contains editable file systems with smart folders for all of your files--both the products you buy and those you sell.  

Downloads are now within the section titled "Downloads" from the Account menu drop-down. The first time you come into My Files, you will be directed to the Downloads section.  If you are not within the Downloads section or folder, navigate there.

To access your purchases an Individual File Downloading option is provided.

INDIVIDUAL FILE DOWNLOADING:

You can access individual product files from the main Downloads screen. To access individual files, here, click on the blue file name that corresponds to the file you want to download.  The file will begin to download automatically. 
(Click the +"show more" if multiple files are provided)