Hello Margaret,
Thanks for reaching out to us!
This is definitely a strange issue to be having. It sounds like you’ve followed the automatic updates for WordPress to 4.0 as well as the free version of The Events Calendar to version 3.7? If so, you will also need to upgrade the Pro version of our plugin up to version 3.7. You should see a prompt to upgrade to the latest version if you have your License Key added to the site. Ensure that your key is added by navigating to the “Events Settings” -> “Licenses” tab on the backend of your site.
Once added, you can check for updates again ( “Dashboard” -> “Updates” ) and you should see an upgrade prompt for the latest version of the Pro plugin.
Let me know if this helps.
Thanks!