Syntax
-Dplugin.dir=/path/to/plugins
        
            This options sets a path, where to find plugins for Jmol.
            Please note, that this option has no effect on the user
            (directory) plugin path ~/.jmol/plugins.
            Jmol will still search for plugins in this directory, which
            also means, that this directory does not need to be defined
            as plugin directory.