This theme has Child Theme support to customize theme without any losses from the main theme.

If you want to make modifications on this theme, it is recommended to use a child theme.
This theme comes with a blank child theme that you can use. In the theme package you can find “libertynews-child” folder.
Upload this folder to your wp-content/themes folder, and activate it from the Appearance Themes. Once activated, you can start editing inside this “libertynews-child” folder.

This child theme includes 2 files that you can use to override parent theme’s style (style.css) and function (functions.php). By using child theme, you will leave the parent theme unmodified, so when a theme update is available, you can simply replace the parent theme without worry about your modified code. For more info about using child themes, please visit this link: http://codex.wordpress.org/Child_Themes