Thanks again. It works (of course) now. Sorry if I was a little slow understending.

Thanks for replay. I am not using Sweet Home 3D with Java Web Start (do not have Java 6 installed, should I?). So I guess goetz answer did not fit my problem. And the file indicated by Puybaret is a .jnlp, so (for what I understood) is suppose to be used by a Java Web Starter (same story I guess).

Hi,
same problem (crash on preferences) on Linux Debian (BunsenLab). Sorry but I did not understand how did you solved, I installed the Debian package and then I tried the version on SourgeForge.
The fact is that Java is out of my knowledge and probably is just me that do not understand what you ...