Just tested again with latest GLGraphics 1.0 and works for me.
This seems to be some incompabilities of your JRE and GLGraphics. Might be related to the native libraries we provide with the Unfolding dist. What system are you using? Which Java version? Which Processing?
Glad to hear you have it working. Removing that parameter swtiches the rendering to Processing's 2D mode. It might be a bit slower, as you are not using OpenGL/GLGraphics, now. (So, for others reading this thread: We suggest keeping that parameter.)