FWIW, I was not able to make this work with NSSM and any version of the folder name or permissions changes. I even tried to get it running in other folders to make it simpler, but no dice. I'm theorizing that NSSM simply doesn't like that some of the parameters are now simply flags and not name/value pairs.
For now, I'm just using the built in auto-start server that comes with the UI, and I simply placed Calibre in the start-up group. I guess it won't kill me to log in, but I might try AlwaysUp if it becomes a problem.
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