You can now specify only a switch if you have no router.
Added capabilities to search for a mac address only by using the --search option.
You can now have multiple routers either on the command line or in a text file if
you have multiple L3 gateways for a switch.
Completely re written from the ground up, now multi threaded. It can scan multiple
switches in a fraction of the time of the old versions. Has support to do WMI scans
of endpoints to collect more information. See the sample sm.conf file.