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That's not useful, you have to write a program to do it. I don't even have a compiler on this box. The other workaround works from the UI, you don't have to write code. That's a completely different use case.

The comment that says "Just installed Scala on my PC but the PATH did not update; presumably the MSI did not broadcast the WM_SETTINGCHANGE message. I added a dummy SYSTEM variable i.e. CHANGE_TO_UPDATE=z, that I update to trigger the WM_SETTINGCHANGE message - problem solved" is the one that solved my issue. I've upvoted the comment but it's not even close to the #1 comment.

Yes, the actual answer is buried in the comments, and is not the "accepted" answer.