Thank you. With the official version it is working fine!
And with the bug report, I can see that i am not the only one by wich the distributed version does not work...

Hi there :-)

SH3D version: 5.7 (latest)
Java version: 10.0.1 / 64 bits
OS: GNU/Linux (Debian sid)

The sh3f files containing the models are stored under
/usr/share/sweethome3d/funiture/
and under
~/.eteks/sweethome3d/funiture/
142.3 Mb of data in each folder.

Only the default models are ...