If you are using version 1.0.0, please download the latest version 1.0.1 as it supports more switches.
If you are already using version 1.0.1 and no MAC address information is shown, the switch probably does not expose it via the standard OID.
In order to help us troubleshoot it, please download the Net-SNMP package
here.
Then locate 'snmpwalk' and launch it as
snmpwalk -v 1 -c communityname x.x.x.x > sometextfile.txt
Where x.x.x.x is the IP address of a Mikrotik switch and then email me the output file to support
at softperfect.com.