Ha not bad :beer: If you hit that very same preset button on any shader of that kind it should be there unless your preferences aren't being saved and that I can't help you with as I've never had...

You can save presets for materials, lights, cameras and all that other good stuff. You can take this route or export the shader, put it in a folder that will be your shader library, get back in...

You can just make a preset instead.