Hey Beth,
You can find all the fixes and new features in the actual Release Notes and when an update is available in your WordPress admin dashboard, select “View version __ details” for the changelog info.
While we don’t currently have an email subscription which notifies you when a new Release Note has been released, you could check out this RSS feed to email tool and use the following feed: https://theeventscalendar.com/category/products/release-notes/feed
I’ve brought your inquiry/request to the attention of those in charge of new information releases and hopefully we can get an email notification set up for when Release Notes are sent out.
I hope this helps and let me know if you’ve got any more questions or concerns. Cheers!