first bug is in the material code itself, there are several checkboxes in the material that you check to enable that type of material.
you need to enable at least on of the checkboxes (glass for example).
after I did this it export the material.
It also seems that the settings are not up to date with the latest slg.exe , it errors on rendertype.
I will update it to work with the latest SLG version.
I have to check what features that has been removed, and what's new.
I will also fix so that when you create a material it checks the "matte" material as default.
I will post updates here as I progress.
Thank you for reporting this issues.
