Update this domain

     This selection causes the DNS (Domain Name System)
databases for the current domain that this software
maintains to be updated immediately.  Before it does 
an update it also saves your current settings 
automatically. If there exists multiple DNS domains, 
all of the other domains DNS data will also become 
live to the state they were at the last time each of 
those domains got an "Update this domain".
     If the following selection is ever made under 
the "Advanced" menu: 
"Remove all DNS databases but not configuration data",
you must immediately select:  "Update all domains" 
under the "File" menu.