[Theme: zeeDisplay] Multi-level menus not working since update

I have today updated my zeeDisplay theme to 1.1 and found that my multi-level menus no longer work. (i.e. previously, when you hovered over a menu item (or clicked on it) the drop down menu appeared). This no longer occurs. I have tried rebuilding the menu but that doesn’t fix the problem. Any ideas?

Regards,
Ben

https://www.ads-software.com/extend/themes/zeedisplay/