Now your Vault's lock screen can be customized with amazing themes to make your device even more stylish. The Vault feature just released several new categories of theme styles.
To select a Vault theme, open the app, tap on TOOLS tab and select the Vault feature.
Enter your pattern (or numerical password).
Tap on "Themes" button (brush icon, located at the top of the screen).
Choose a theme category to open its options.
Select your preffered theme.
Confirm your choice by taping on "USE SKIN".
To restore DFNDR's default theme, on Themes categories screen, just tap on the Options button (three dots on the upper right corner)
Select "Apply the original theme" option.