* Feature - Added compatibility with WooCommerce High-Performance Order Storage.
* Tweak - Added links to the license keys, the reports, the documentation page, and to get support in the plugin list.
* Tweak - Updated plugin author.
* Tweak - Tested compatibility up to WC 7.3
* Tweak - Tested compatibility with WP 6.1
* Fix - Fixed broken 'Total software sales' and 'Total software sold' metrics in reports.
* Dev - Implement the singleton pattern in the main plugin class.
* Dev - Updated the minimum requirements to WC 3.5, WP 4.7, and PHP 5.4.