Jordan,
Thanks for getting in touch! We never recommend that users edit the plugin files directly, since your changes will be lost whenever you update the plugin. Take a look at our themer’s guide, which will show you how to properly override template files.
If you’re looking to customize the list widget, then you’ll want to override ‘plugins/events-calendar-pro/views/pro/widgets/list-widget.php.’ The loop is fully contained in that file, so you should be able to modify as needed to just display some blocks that are styled similarly to the mini-cal widget.
Hopefully that’s enough to get you started, but let me know if you have further questions. Thanks! ๐
-Casey-