Lock directory - this option will password protect the current active 
        directory.  That is the directory of the current window.  Root 
        directories cannot be locked.  You will be prompted for a password.
        Type it in carefully and don't forget it!  

Unlock directory - this option will unlock a directory that has password 
        protection.  First, you will be prompted for the password for this 
        directory before you can unlock it.


