Removing navbox?

I have been desperately trying to remove a table (ugh..) this plugin uses, class navbox, which isn’t really necessary for a site I’m running and ruins the layout. Have tried many different CSS variations. I cannot see why they’re not working!

Examples:

table.navbox {
display: none !important;
}
table.vertical-navbox {
display: none !important;
}
.navbox table, .navbox tbody {
display: none !important;
}
.navbox {
display: none !important;
}

The table (class: navbox) is still showing in any case, even the above CSS works in Chrome Developer Tools. I cannot imagine what I’m doing wrong. Anybody know, or know some other method of removing the navbox from this plugin? Is there something special with tables and CSS (haven’t used tables for over a decade..)?

Any help would be greatly appreciated.

Otherwise a great plugin!

https://www.ads-software.com/plugins/wiki-embed/