Hi @acqua,
Sorry for the confusion here! I may not have been totally clear.
You do not need Events Calendar PRO. What I meant to say is that the related events box you are referring to does not seem to have anything to do with The Events Calendar, Event Ticket or Event Tickets Plus. Instead, it is likely coming from either your theme or another installed plugin.
You can reach out to the author of the theme or plugins where the Related Events box is coming from. Or, you can provide me with a link where I can see a live example of the box and I can provide you a CSS snippet to hide it.
Does that help clarify things a bit? Please let me know.
Thanks,
Geoff