Download the new RouterOS 6.0rc14 release over the torrent network: http://www.mikrotik.com/download/routeros-ALL-6.0rc14.torrent
Otherwise please visit http://www.mikrotik.com/download to pick exact version!
6.0rc14 changelog:
*) route - make connected routes inactive when interface has no link;
*) ipsec - changing or removing unused peer or proposal config won't flush active SAs;
*) console - add 'without-paging' to more 'print' commands;
*) route - automatically repair FIB inconsistencies;
*) ipsec mode-cfg - unity split include support;
*) ipsec policy - template matching for policy generation;
*) metarouter: fixed occasional lockups on mipsbe boards;
*) fixed crash when bridge filter rule had action=return for rule in builtin chain;
*) traffic-flow - fixed deadlock and crash on multicore;
*) fixed memory leak on CCR with PPPoE interfaces;
*) improved PPPoE interface encapsulation performance;
*) fixed queues - total amount of traffic passing through queues sometimes was about 1Gbit;