Create the wall with your desired height. Export the wall as .obj next import it to your furniture library. Once you click and drag the wall on to the floor plan,you can change the elevation.

I'm using Sweet Home 3d Version 5.2a Java version 1.8.0_91
Thanks.

I’m having the same issue, has anyone come up with a working solution? I have tried unzipping the plug-in and copying the content into Home/.eteks/sweethome3d/plugins. I have restarted SH3D, but still I don’t see the new plug-in options. If anyone knows the answer to this problem, please respond ...

This a link to a video tutorial on creating round walls.