Thank you, I did not know there was a changelog for the RouterBOOT too. I found it here: http://wiki.mikrotik.com/wiki/RouterBOOT_changelog
But it is stuck at version 3.12, while in the GrooveA’s page I can download the 3.14 version only.
I would like an official reply by Mikrotik, because in the wiki I can not find anything about compatibility between the RouterBoot versions newer than the RouterOs incorporated one.
I am using RouterOS 5.26 and Firmware 3.07 that is built into it.
I suppose the 3.14 firmware will be built into the next RouterOS (5.27 and 6.13), then I will wait for the next official release before upgrading the RouterBoot.