How to Manage Theme Fonts
The theme fonts are set in pj/theme-options/theme.options.php file, lines 231-257. You can replace them with any other Google fonts you need.
Here is the screenshot:
In order to upload custom fonts, please use pj/css/font-face directory.
You can find the list of theme Google fonts in pj/includes/lists.php file, from line 738. To add new Google fonts, just duplicate one of lines and replace the font name with what you need:
'Advent Pro' => array('family'=>'sans-serif'),