If you'd like I can request access to your store and make the change for you, not sure what you've got going on.
I requested access to your themes. You should receive an email with the email you have associated with the account to approve or deny my request.
So I tried them, and they don't work.
Also - the top bar header now shows the Eventbrite link. I do not want this in the header area at all.
I tried them on a few browsers to make sure and each one is not working.
Thanks for trying... Please remove the link in the header as it is not working properly.
If you'll look you'll see I made a duplicate theme. You'll need to preview that one to see the changes. Then publish it when you know it's what you want. And the link thing in the header is your doing, you didn't put it inside script tags. I haven't touched your live theme, I did however remove it in the duplicate.