Errors in Unity After Updating to Unity 4.5.2 and Vuforia 3.0.9

I’m stuck. Ever since I upgraded to Unity 4.5.2 and Vuforia 3.0.9, I’ve been getting compiler errors. I followed the migration steps and I tried a bunch of other things without success. Here are the errors I’ve been getting:

Assets/QCAR/SampleImport/SampleImport.cs(8,7): error CS0246: The type or namespace name `UnityEditor’ could not be found. Are you missing a using directive or an assembly reference?

Assets/QCAR/SampleImport/SampleImport.cs(23,17): error CS0103: The name `QCARUnityImpl’ does not exist in the current context

Assets/QCAR/VideoPlaybackScripts/VideoPlaybackEditor.cs(18,7): error CS0246: The type or namespace name `UnityEditor’ could not be found. Are you missing a using directive or an assembly reference?

I haven’t altered either of these scripts. Both are original code.

Anyone know how to fix this?

Fixed by moving scripts in to the editor folder. Thanks to Wyatt and Will. Now getting Mach-O linker errors, but the main question has been answered.