Do you speak about the links in the FAQ How can I disable 3D features in Sweet Home 3D? ?
It's normal they brought the same files as the ones for Sweet Home 3D, since Sweet Home 2D uses the same classes. The 2D version only is just an internal switch.
If Java is installed on your computer, you can try also with the links http://www.sweethome3d.com/SweetHome2D.jnlp
or http://www.sweethome2d.com/SweetHome2D.jnlp