Hey there, we've just released a new build, which is
available for download through our website, in which we've fixed the issue on not copying defaults to material values when changing Type from Global to Property over property type nodes.
We've also took this opportunity to re-factor Global variables behavior over property type nodes, so that Material values can no longer be edited, and an auto-fetching is performed every 2 seconds for global variables values.
Thank you once more for taking the time to report this, feel free to get back in touch if you come upon any further issues, happy shader creations!