All settings you can find in BeRocket_product_brand class in static variables $defaults.
public static $defaults = array(
'display_thumbnail' => '',
'thumbnail_width' => '100%',
'thumbnail_align' => 'none',
'display_description' => '',
'product_thumbnail' => '',
'custom_css' => '',
'script' => array(
'js_page_load' => '',
),
'plugin_key' => '',
);