Compiler Error?

I have been trying to run the Island Demo in Unity 3D 3.3 But TerrainLightMapper is not a part of Unityeditor it says.
Thanks to anyone who can help

   Destined

Don’t use the Island Demo. It’s outdated. It can be made to work with the newest versions of unity, but you’d have to edit out some lines of code. It’s probably easier and better to just check out the Bootcamp demo that comes with unity 3.x

Thanks
and the error is
Assets/Editor/Updatetreecolors.js(31,29): BCE0019: ‘TerrainLightMapper’ is not a member of ‘UnityEditor’.