Hey @Abigail,
I’m really sorry about this bug, it’s one we’ve found and have just fixed in our forthcoming Maintenance Release.
This update will be officially released as early as the end of the day today, or tomorrow perhaps – you can wait for this official update, or you can even manually download some Release Candidates right now by heading to the “My Account” Page here on http://theeventscalendar.com:
http://theeventscalendar.com/my-account/downloads
You can manually download the 4.0.1 release there and install it on your site. If you want to wait for the official release, then that release will be available for a one-click automatic update right in your admin 🙂
Thank you!
George