I've noticed that the existing Blender Exporter script is starting to show signs of its age with the latest versions of Blender. For example you can no longer create materials when you are in Octane Render mode. At the moment I am having to swap back to Blender mode, create the material and then swap back to Octane mode in order to render.
Lionel, are you still around (he shouts into the air). I know that the official blender integration is coming but for now it really would be good if the exporter could be patched.