You can set defaults through two methods:

Method 1

1. From panel settings tap on general tab

2. At general tab there is a entry called "Set Defaults"
3. Tab on Defaults to change popover bible translation

Method 2

1. Tap on any Cross Ref. icon or any Bible ref button  to open verses popup.
2. Tap the gear icon at the lower left corner.
3. The Popup settings will be shown:
4. To change the default Bible : Tap the Bible Cell and select a new Translations.