@ Joost
In that case it can only be changed via a filter. Drop the following in the theme’s functions.php file:
add_filter( 'cn_output_default_atts_address', 'joost_change_address_format' );
function joost_change_address_format( $atts ) {
$atts['format'] = '%label% %line1% %line2% %line3% %zipcode% %city% %state% %country%';
return $atts;
}