Thank you for your feedback. I would agree that Joomla in general is a bit confusing and you have to invest a certain amount of time to get familiar with 3rd party extensions (either our templates or someone else's).
If you are still trying to find the solution, the section in question is part of JD Builder and is second section from top. If you use Live Preview you should be able to edit it using Navigation and Guides.
Hope this helps!
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