Good evening Craig and welcome to the Events Calendar forum!
Thank you for your interest in our products.
We’ll be glad to answer your questions.
This extension does exactly what the following page describes: change the actual URL to some text of your choice (by default, the displayed text will be “Visit website >>”.
https://theeventscalendar.com/extensions/use-a-custom-label-for-the-event-website-url-field/
You can tweak the text by simply editing the index.php file located in the extension folder.
Scroll all the way down to the end of the file and replace the text with what you like.
Once that is done, upload your custom extension back on your server.
Let me know if that helps.
Have a great day!
Geoff B.