Hi,
Sorry for the issues you are having. I can help troubleshoot this with you.
Can you please confirm you are following all these steps:
Visit License Tab
Enter License Key
You get a Green License Valid Message
You are then clicking “Save Changes”
Then you get a “License key(s) updated.” near the top of the page.
Also you can can always download the latest version from your account here on theeventscalendar.com
Let me know if it is not working after following those steps and we can do some troubleshooting steps next.
Thanks