Most likely you have filled the Hide/Show Only for URL match field incorrectly.
And now you or have deleted everything from that field or turned off the popup with it, or just deleted the wrong popup. Or several popups.
If you still want to use Hide/Show Only for URL match – Use official documentation about regular expression to make this work correctly – https://secure.php.net/manual/en/reference.pcre.pattern.syntax.php
In the case you want to show or hide the popup on certain pages/posts – https://supsystic.com/documentation/show-popup-certain-page/