The old version used to have a supposition plugin support (which if I recall was in beta).  Including this would stop drop-down menus from flowing off the screen.  The latest version doesn't include this, and doesn't seem to mention it.

Does anybody know if there are any options included as default now, or any known workarounds to automatically reposition so menus (try to) stay on screen?

As you can see here, the menu at the top is aligned to the right side of the screen, and the last menu is cropped if the display isn't wide enough (shop menu) -  http://apiotest.keypublishing.co.uk/.

However, a working version (v1.4.8) is fine here (although it doesn't work on the latest version of jQuery that I'm updating to)  -  http://www.key.aero/

Any help greatfully appreciated, since I'm scratching my head here.  Thank you.