Just updated to version 18.104.22.168 as prompted by WordPress.
Since doing so, all pages that have a contact form have this error just before the form;
"Notice: Use of undefined constant qtrans_convertURL - assumed 'qtrans_convertURL' in /hermes/waloraweb081/b2463/moo.pencomrad/wp/wp-content/plugins/si-contact-form/si-contact-form.php on line 917"
Is this a bug in the new release? It was working perfectly fine before.