How to prevent menu wrapping

Using Catch Everest Pro www.lacostafilmfestival.org Hi Sakin, This may still be a custom question, but possibly not.  Currently we are experiencing a situation where the main navigation menu wraps the last menu item to a second line - only on some browsers (like Internet Explorer) when in full screen.  Does not do that on Chrome or Firefox.  This is possibly related to the floating middle logo which is now spacing out menu items to left and right.  But since the IE margins on left and right are wider than Firefox - it seems to have less room for the full menu.    Also happens on Chrome if we resize the window down just slightly (before converting to responsive). If you have suggestions to reduce the IE margin or to scale down the menu on just IE for example, that would help.