Hi Roger and thanks for getting in touch!
I’m afraid there is no live demo of the back end of the plugins–instead we offer a full refund within 30-days of purchase to give you time to explore and test things in your own environment.
Also, The Events Calendar itself is completely free of charge and is the same back end as Events Calendar PRO, minus some advanced features, like recurring events. That’s another great way to demo the product before diving into one of the premium options.
Lastly, we do have a Knowledgebase here on this site, including new user primers with links to various plugin features, many of which include video screencasts.
Please do let me know if you have any questions about specific features and I’d be happy to help answer them!
Cheers,
Geoff