Reset Admin Password on a Dude Server

After a while my dude server was working ok, i can’t start it again anymore, even locally with the same auth information (it has not changed), how can i reset the admin password withuot reseting all the server information, my last backup is corrupted.

Thanks in advance. Any tip will be helpfull.

Currently it is not possible to reset Dude configuration separately.
Only by system reset-configuration, that is applied for entire RouterOS configuration.

is it possible now with 4.0beta version?

I use RB450g OS 5.26 with Dude 3.6 installed . I have tried to do hard reset with shorting routerboard reset jumper. All OS settings was cleared , but Dude password wasn’t reseted. What should I do?