Thanks for your reply,
Eh emm...I jumped the gun!
I looked again at the download 3 folders udm4, udm4-asp and udm4-php so I figured the udm4-php was the one I wanted I uploaded the contents to my doc root. When I browse to mysite/template.php I see:
Accessible Website Menu
Ultimate Drop Down Menu 4.51 by Brothercake
A bunch of links.
Additionally when I look in the udm-resources folder I don't see a udm-custom.js
PS I can't wait to start working with UDM4 menus, it really is just what I'm looking for!