Good evening Heidi and welcome back!
Thank you for reaching out to us.
We are sorry to hear that you can no longer edit recurring events. Yikes!
I would love to help you with this topic.
Here are a couple of things to try:
- Temporarily revert back to a default WordPress theme such as twenty-sixteen and see if the issue persists
- Go over to Events -> Settings -> General and hit the save button
- Re-save your permalinks.
- After a database backup. Deactivate and Delete the Events Calendar and the Events Calendar Pro plugins. Download a fresh copy of them from the site and reinstall them.
Let me know how that goes.
Best regards,
Geoff B.