@bdigges – Due to ww.wp.xz.cn guidelines we cannot provide support for our paid products here. Please submit a support ticket at https://wppopupmaker.com/support/
That said several browsers over the last few updates (Chrome 45+) have removed the ability to customize those messages. Though we have been looking for a workaround there doesn’t appear to be any and other browsers are following suite.
We would have removed this feature from the extension entirely but due to many users already using it we didn’t want to break their setups. Unfortunately not much we can do about it, though I will get our extension information updated to reflect these browser changes.