Why not use your own simple locking system via a .bat file script? Choose a shared location for your lock file and only launch calibre if the lock file does not exist. On return to the script when calibre closes you then delete the lock file. Then make each user a shortcut to this script in place of the normal calibre shortcut so that they don't run calibre outside of the locking.
This should work as an interim solution although the .bat file will stay open whilst calibre is running and locking could be circumvented by a rogue user deleting the lock file.
Last edited by Agama; 08-30-2014 at 02:15 PM.
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