Hi,
Sorry for the issues you are having.
You have to update Pro to the latest version of 3.12.
You can download the latest version from your account here on theeventscalendar.com
And follow these steps for manually updating it:
Manual Updates
I would also recommend setting up your license and reading through these articles to get Automatic Updates working:
Finding and Inputting Your License Key
Let me know if you have any follow up questions.
Thanks