Hello, I am having the exact same issue as the OP. Once I hit "NEXT" the Import Wizard places image of the file I am attempting to import off-center on the views screen and completely locks up.

I would post a screen grab but..
1. I don't know how.
2. It would look exactly like the OPs.

Here is the link... it happens with every file I have attempted to import form this page, including objects already in SH3D.

I am on a Mac running Mountain Lion 10.8.1

Any help or guidance or suggestions would be much appreciated.

Thanks!

Thanks