To all of you who get the error "there should be a folder called ksp_data' ect. get unity 4.6.4; https://unity3d.com/get-unity/download/archive goto 4.x, go down to 4.6.4 get the unity editor, intall, folow steps in original post.
I don't know if it is supposed to be impossible to launch a rocket or if it is just me not being able to fly, whenever I launch a rocket it go up for a few meter and than starts to turn extremely white sas on and I'm not able to correct it.