Ovo si vidio / znaš ?
The reset button has the following default functions, or can be modified to run scripts:
Hold this button during boot time until the LED light starts flashing, release the button to reset RouterOS configuration (total 5 seconds).
Keep holding for 5 more seconds, LED turns solid, release now to turn on CAP mode. The device will now look for a CAPsMAN server (total 10 seconds).
Or Keep holding the button for 5 more seconds until LED turns off, then release it to make the RouterBOARD look for Netinstall servers (total 15 seconds).
Regardless of the above option used, the system will load the backup RouterBOOT loader if the button is pressed before power is applied to the device. Useful for RouterBOOT debugging and recovery.
https://wiki.mikrotik.com/wiki/Manual:Netinstall
Ovdje kaže da bi trebalo koristiti netinstall version to the firmware you want to revert >
https://forum.mikrotik.com/viewtopic.php?t=179936
Nisam sve čitao ali pogledaj >
https://forum.mikrotik.com/viewtopic.php?t=183767