From the website

There are many Bible translations, Bible Study Tools, devotionals, and other items available for download and purchase on our website at http://www.olivetree.com/store/home.php?cat=259. You will need to install a Bible or other database file and the BibleReader application itself. If you do not want to purchase a Bible translation, there are many free versions available for download.

Once you have downloaded a Bible file (or files), install it on your device. You can install multiple Bible translations and other items; you are only limited by the amount of available RAM on your device.