bbPress.org

@dreuezekiel – ok try adding this to your functions file

add_filter('bbp_before_has_forums_parse_args', 'order_by_freshness', 10, 2);

function order_by_freshness ($args='') {
	$args = array(
	'meta_key'   => '_bbp_last_active_time',
	'orderby'    => 'meta_value',
	'order'      => 'DESC',
	);
	return $args ;
}

if you don’t know how to do that, come back and I’ll wrap it in a baby plugin for you