I remember now. It's the ubermenu CSS file, it's not the same as on the live server.
This file: \wp-content\plugins\ubermenu\standard\styles\basic.css
You don't need to copy the whole file if you don't want to, but you need to add 2 more lines to the beginning of that file. So on the demo server where you see this on line 11:
#megaMenu.megaResetStyles span, #megaMenu ul.megaMenu, #megaMenu ul.sub-menu,
change it to:
#megaMenu.megaResetStyles div:not(.probox), #megaMenu.megaResetStyles div:not(.probox *), #megaMenu.megaResetStyles span, #megaMenu ul.megaMenu, #megaMenu ul.sub-menu,
and that's it. Problem solved. I didn't edit, because I don't know where the demo files are.Best,
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