A question came up via comments. (I was going to say that it came up recently, but another glance reveals that it came up in, oh, June. I don’t think I can fairly call that recent…)
“…the fix seems only to work if the directory structure exists…”
This is true, and worth noting. If you point the fix to a directory which doesn’t exist, the shim won’t create the directory, it will just fail, in much the same way the application would fail if it were trying to create an application in a directory which didn’t exist (which, to Windows, appears to be exactly what happened). So, if you’re planning to shim an application and want to create a directory to store things, you should consider creating this directory at install time.