DUDE LOSING SETTINGS

Hello everyone, I have the dude installed on a RB HeX S, I put some equipment to be monitored. The problem is that when you disconnect the Routerboard and connect again, the dude loses all devices being monitored, their settings are cleared, they go back to zero. How can I solve this?

Don’t store the database in volatile memory.

thank you
I installed it in a pen driver, I was able to solve the problem. Now I have another.

For example, I can monitor a mikrotik pppoe server. Plus I can not monitor the external devices behind that server, such as a rocket. I made the agent settings correctly, as it is in the wiki. Plus the snmp info does not go up.
What can it be?