I'm running on Ubuntu, every time I try to install a plugin I get the following error pop-up from sh3d.

Running command: /usr/bin/sweethome3d ExportToHTML5-1.1.sh3p

Getting "Can't import plug-in"
pop up in dialogue box.

I've also tried manually moving the extract into ~/.eteks/sweethome3d/plugins but it doesn't seem to recognise it.

Thanks.