Interesting. Did it not work for you? It works fine for me without this change. There are no spaces in the path, so I don't see why quotes are required there. Its more impoortant that the entire command is wrapped in quotes so it appears as one to the /c argument.
I fixed this in my guide on Github, but editing posts is not allowed here. I've reported the post with my edit request. I believe 15 seconds should be fine for SSDs and HDDs as its an empty folder. Others may also not want to wait 2-3 minutes.
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