Hi Kathleen,
Thanks for getting in touch!
I’m afraid that our plugins are only compatible with WordPress sites and do not offer integrations with other content management systems like Squarespace.
I see you have already purchased a license for Events Calendar PRO. Do you have a WordPress site where you are using the plugin, or did you purchase it hoping to install and use the plugin on Squarespace? If it happens to be the latter, I’d be happy to initiate a refund for you if you would prefer. Just let me know!
Thanks,
Geoff