Thanks, I eventually worked those out.
Though it does emphasise the limitations of the Page Builder for anything other than a new or very small site.
I've opened another ticket for a refund.
A JA Subscription was purchased for JA Alumni template for a site upgrade to J4, but it's barely J4 compatible.
Correct me if I'm wrong, but after a wholly unnecessary amount of Googling, I've discovered that because it's a T3 template on Joomla 4, it doesn't have ThemeMagic?
https://www.joomlart.com/forums/d/40786-how-to-dodge-thememagic-lack
I'm certainly not interested in paying $89 to have to edit CSS files to change fonts and colours, in 2023.
Any T3-only template is effectively being mis-sold as J4 compatible, in my opinion. Your pre-sales information needs a lot of work.