Modified class-cache:
$options = array( 'threshold', 'show_pass_post', 'past_only', 'weight', 'require_tax', 'exclude', 'recent', 'limit', 'post__not_in' );
// WHERE
$newsql .= " where post_status in ( 'publish', 'static' ) and ID != '$reference_ID'";
if ($post__not_in)
$newsql .= " and ID not in (".join(',', $post__not_in) .")";
Modified call:
yarpp_related(array(
'post__not_in' => array(270),//ignore posts
...
));