Hello,
Thanks for checking out our plugins! Many of our users do use them in conjunction with the Divi theme, but events pages do not use the Divi builder by default (you may be able to do a customization to add it – this guide from Divi has some info on adding the builder to custom post types). There is a known issue with the number of events shown per page when using Divi, but we have a free extension that you can download to fix this issue.
Pro does come with some shortcodes for full calendar views and widgets that you can add to another page that is using the Divi builder.
We do offer full refunds within 30 days of purchase, so if you’d like to take Events Calendar Pro for a test run, feel free to do so! Please let me know if you have any additional questions.
Thanks,
Jennifer