I still have the website and registry entry for Windows 7 and apparently the website says it works on Windows 10 also. Maybe you have already tried this but I will try it anyways and get back to you. I also have the script.
As you can see in this tutorial, that registry setting is of little use since Windows 10 1703. As of that update, you can still make the registry change to allow free placement of icons within folders, but the functionality that remembers those positions is gone.