Direct from Mikrotik
To upgrade, click “Check for updates” at /system package in your RouterOS configuration interface, or head to our download page: http://www.mikrotik.com/download
What’s new in 6.34.6 (2016-Jun-06 08:37):
*) discovery – fixed identity discovery (introduced in 6.34.5);
*) log – fixed time zone adjustment (introduced in 6.34.5);
*) snmp – fixed snmp timeout (introduced in 6.34.5);
*) vrrp – fixed missing vrrp interfaces after upgrade (introduced in 6.34.5).