Download the new RouterOS 6.3 release over the torrent network: http://www.mikrotik.com/download/routeros-ALL-6.3.torrent

Otherwise please visit http://www.mikrotik.com/download to pick exact version!

6.3 changelog:

*) ssh - fixed denial of service;

*) traceroute - show mpls labels as well;

*) bug fix - sometimes some new interfaces could not be created properly any more (f.e. some pppoe clients could not connect);

*) console - added '/console clear-history' command that clears command-line history for all users, requires 'policy' policy;

*) sstp - limit packet queue for each device;

*) RB2011L - fixed occasional gigabit switch-chip lockup;

*) user manager - will warn on 1MB and stop before reaching minimum of 500KB disk space;

*) hotspot - do not account traffic to local hotspot pages;

*) ppp, hotspot - added ability to specify where to insert rate limiting queue, it's parent and type;

*) pptp, l2tp, sstp - allow to specify server via dns name;

*) dhcp - added ability to specify where to insert rate limiting queue;

*) www proxy - support ipv6 parent proxy;

*) webfig - fixed problem when opening quickset page country was automaticly changed to etsi;

*) traceroute - added mtr like pinging;

*) fix queues - correct queue was not installed when last child removed;

*) fix simple queues - sometimes some simple queues would stop working after configuration changes;

*) console - fixed issue with local variables having non-empty value before first assignment;

*) console - fixed command ":global name" without second argument to not create or change global variable "name", only effect is to make "name" refer to global variable.

*) console - fixed passing local variables as argument to function;

*) RB1200 - fixed crash when receiving over l2mtu size packets on some ethernet interfaces;

Source