Download the new RouterOS 6.1 release over the torrent network: http://www.mikrotik.com/download/routeros-ALL-6.1.torrent

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

6.1 changelog:

*) pptp, l2tp - fixed crash when tunnel mru was too big and fragmented ip packet was received;

*) hotspot - fixed problem when after upgrade hotspot html directory was empty;

*) ipv6 nd - dns dynamic-servers were not included in router advertisements;

*) winbox - fixed problem Switch menu disappeared on RB2011;

*) fixed memory amount issue on RB1100AHx2;

*) console - '/import' prints each command that is executed;

*) console - 'import' has new argument 'from-line' that starts executing commands after specified line;

*) secure api - fixed problem when wrong client ip address was reported;

*) hotspot - fixed universal client;

*) api - added support for API over TLS (SSL);

*) api - api service is now enabled by default;

*) ppp - do not show R flag for locally authenticated users;

*) vrrp - fixed ah authentication;

*) webfig - added support for RADIUS authentication (via MS-CHAPv2);

*) ipsec - for peers with full IP address specified system will autostart ISAKMP SA negotiation;

*) trafficgen - added inject-pcap command for replaying pcap files into network;

*) dns - retry queries with tcp if truncated results received;

*) improved queue statistics updating;

*) fix 1G linking with some Cisco devices (affects RB7xx, RB9xx, RB1100, RB2011, CCR);

Source