Sorry for the untimely response.
Thanks for your feedback, we’ve added the option to the theme, so everyone will get it on the upcoming update
For now, you can simply get it by replacing the file wp-content/themes/circleflip/creiden-framework/header-builder/header-ad-block.php
with the one attached
Now when you edit the “Ad block” you’ll see an option saying “Open Ad in a new tab?”
in your case, you would leave it un-checked