There are few shortcuts at this time. There are available when an OpenGL view has the focus:
Materials to be added in the library can be saved in :
You may have the same materials several times (with different names) if you installed previous releases. Clean the system wide library before new install to fix this.
If you installed a previous version delete the ~/.truevision folder.
You're probably using Nvidia driver, that doesn't provide this
file. You have to edit libGLU.la (often found in /usr/X11R6/lib/)
and remove libGL.la from dependencies. It should work :)
New: You may also experience this if you installed gtkglext from binary package. You'll have to fix libgtkgkext*.la and libgdkgkext*.la the same way...