This plugin was removed from version 4.2.1. Please use Membership Pro - Incomplete Payment Subscriptions Notification scheduled task instead.
Each time the plugin runs, it will check and send notification to administrators list of subscription records which failed to process payment for the registration (payment processing error or users ignore the payment process....). By default, it will be run every 12 hours, you can change Cache Time (Hours) parameter to have it run more often if needed (for example, every 4 hours)
To use this plugin, you need to go to System -> Plugins, find and enable System - Incomplete Payment Subscription Notification plugin. It has following parameters, you can be changed it to meet your own need:
