Please note that official support for this menu version has now ceased. There are still plenty of users, though, and the forum is still running. Some of our long-time users may be able to help you out.
Is Milonic DHTML Website Navigation Menu Version 3.4.0 ** BETA ** open menus with the keyboard the latest or should I be using Milonic DHTML Website Navigation Menu Version 3.3.19?
The 3.4.0 version is available from the Easy Sample page.