Download the new RouterOS 6.0 release over the torrent network: http://www.mikrotik.com/download/routeros-ALL-6.0.torrent

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

6.0 changelog:

*) ipsec - added /peer passive option which will prevent starting ISAKMP negotiation and signifies xauth responder/initiator side;

*) RouterBOARD - default wireless config now includes password - serial number;

*) lte - support YOTA WLTUBA-107;

*) console - fixed crash when variable name was not specified for

*) hotspot - added mac-cookie login method; http://wiki.mikrotik.com/wiki/Manual:Hotspot_Introduction#MAC_Cookie

*) lcd - show a message when system shutdown is complete;

*) lcd - added Log screen which is accessible through the Main Menu and shows log messages where action=echo;

*) ipsec - added pre-shared-key-xauth and rsa-signature-hybrid authentication methods;

*) increased max l2mtu on CCR to 10226 bytes;

*) fixed crash on RB1200;

*) fixed bonding - did not work after remove, undo;

*) fixed queues - router could become unresponsive when configuring queues;

Source