Посмотрите в базе данных таблицу shop_url
UPDATE `ps_configuration` SET `value` = 'http://site.ru' WHERE `name` =`MB_CANCEL_URL`;UPDATE `ps_configuration` SET `value` = 'site.ru' WHERE `name` =`PS_SHOP_DOMAIN`;UPDATE `ps_configuration` SET `value` = 'site.ru' WHERE `name` =`PS_SHOP_DOMAIN_SSL`;