PopUp Pro breaks my WooCommerce shop page

For the last couple versions of either the PopUp Pro plugin, or WooCommerce, I get WSOD on the store home page

http://funnytimes.com/gift-shop-2/

...if I have PopUp Pro turned on. I've disabled it ofc, for now, but is this a known conflict? Is someone on the plugin development team working on a resolution?

For the record, I tried disabling all non-essential plugins, but this is a live site with live customers and I wasn't able to totally shut it all down for diagnostic purposes.