6.42rc2 changelog:

*) dude - fixed e-mail notifications when default port is not used;
*) firewall - fixed "tls-host" firewall matcher;
*) firewall - limited maximum "address-list-timeout" value to 35w3d13h13m56s;
*) routerboot - fixed missing upgrade firmware for "ar7240" devices;
*) tile - fixed USB device speed detection after reboot;
*) traffic-flow - do not count single extra packet per each flow;

Download the new 'RouterOS 6.42rc2' version here: https://www.mikrotik.com/download