Sorry Grant, at its core this is a theme-related issue and your theme developer is wrong about not being able to change things. We documented the template-related changes literally file-by-file in this post here, which we broadcasted over our social media accounts and via email well in advance of the 3.11 release: https://theeventscalendar.com/the-events-calendarproadd-ons-3-11-things-to-be-aware-of/
Item #15 there includes all of the template-related changes that matter here.
Is your main goal to have the two “venue” and “organizer/details” info boxes just be on the right side of the page? If so, then until your theme developer updates their theme, you should be able to get that to work by adding the following CSS to the bottom of your theme’s style.css file:
.tribe-events-single-section.tribe-events-event-meta {
clear: both !important;
float: right !important;
}
Here’s a screenshot of how that makes thing look on your site → https://cloudup.com/cai0XsSJjsm
I hope this helps, and eel free to pass it along to the theme developer along with that blog post of ours which lists all the template changes.
Cheers,
George