[Plugin: Send email only on Reply to My Comment] manage the subscriptions Fatal error

Click manage the of subscriptions the following information:

Fatal error: Call to undefined method wp_subscribe_reloaded::get_subscriptions() in /home/xxx/public_html/test/wp-content/plugins/one-email-only/templates/author.php on line 53

http://wordpress.org/extend/plugins/send-email-only-on-reply-to-my-comment/