Disable popups from MC4WP in favour of Boxzilla?

Hi all,

I inherited the maintenance of a charity website, and they’re using MC4WP for a pop-up email subscription. I installed and configured the integration with Boxzilla, but still getting pop-ups from MC4WP directly, so there’s two pop-ups instead of just the one from Boxzilla with the MC4WP shortcode in it.

Is there some setting in MC4WP that controls this?

Thanks!