Sketchup Twilight settings not saving

I built a model in Sketchup Make 2017 and adjusted settings (materials and environment) within the Twilight rendering extension. I saved the file down to a Sketchup 2016 file to transfer to someone else to use. When they opened it up to render, they realized that the material settings within Twilight did not save/transfer. All other settings within the file were preserved. The Twilight material settings were reverted to a black color, which we had to manually go in and reset all the material settings within Twilight to produce the desired rendering.

Usually when a file is saved down to a previous version, all settings, even the settings within Twilight, are preserved. Is there a patch for this issue within Sketchup 2017?

You should contact the author of Twilight about this.