Hello @Jay545452,
To delete the Newsletter Popup you have to delete the Newsletter element from the header content, for that, please go to the Dashboard >> XStore >> Theme Options >> Header builder. For reference, please see the screenshot here: https://gyazo.com/4e88fe345b18750e31370f6c464bcb74
If you are still having difficulty, please provide us with the Site WP admin access in the private content area of this topic. We will then be able to investigate the issue further and provide assistance.
Best Regards,
8Theme’s Team