Digital products are not refundable.  All our digital formats (mp3, mp4 and pdf) have been selected and tested for compatablity with the major desktop and handheld device operating systems.  Applications needed to play these files come preinstalled on every device.  Many of our programs are compressed into zip files for ease of download.  

However, If you are downlaoding to a phone or tablet, you may need to download an "unzipping" application.  Trustworthy free unzipping apps are available in your device's app store.

iOS - iZip  
Android - AndroZip
Windows Phone - Pocket Extractor