Thanks for the update Galen. I'll advise after the next plugin update if the problem still persists as, like Drake Snider, I'm unable to open existing saved scenes when this issue occurs, so I'm currently avoiding using Substance materials, or having to save scenes prior to adding Substance materials in case the textured scenes are unable to be opened at a later date. In this manner, I can at least revert back to the pre-texture scene and add alternative (i.e. non-Substance) textures. Is there a date for the next plugin release, or is it a case of regular checking on the website?