WooCommerce product downloads not working in cloned site

Main site: http://preachnet.com/freeindeed
Cloned site: http://preachnet.com/clone

The WooCommerce product download buttons are working normally in the main site, but in the cloned site, when I click on any product download buttons (they are all audio files), the browser simply opens a player and plays them instead of downloading them.

How can I fix this so the download links work correctly in all cloned sites, as I am about to have a lot of them, and they of course need to work correctly.