One question is why the OP is using --s when the documentation shows a single dash for the one character commands? I.e, -s or --shutdown-running-calibre work to kill Calibre on my system but --s does nothing.
On another hand, quite a few of the command line options do not seem to do anything on a Windows system (i.e. -h or --help, --version) unless I use calibre-debug instead of calibre.
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