Tak tady je jasna odpoved:
Older Routers
If you do not see the `upgradable-to` value in this menu, you probably have RouterOS older than 2.9.27, in this case - it depends on what date it shows in this menu.
* if the date is in future, upgrade is possible via all known upgrade methods, including FTP
* if the date is in the past, upgrade is still possible, but only via Netinstall
//primo z http://www.mikrotik.com