Payment Reminder Notifications - Installation
Once the extension has been downloaded, go to System / Magento Connect / Magento Connect Manager.
Select ‘Upload package file’ option to select and upload the file downloaded:
Refresh cache and run the compilation if it was enabled.
Run this extension in a test environment prior to run in a real environment in order to confirm the configuration defined. Keep in mind that this extension can cancel orders and notify customers. Try it before in a controlled environment.
Contact us at here for technical support.