I've installed the two files that are included with the zip file, but when I got to the admin section, i get this error:
Fatal error: Cannot redeclare class ot_xmembers in /home/easymotoring/public_html/catalog/includes/modules/order_total/ot_xmembers.php on line 13
That code is this:
class ot_xmembers {
All help appreciated