I am a novice in networking but successfully set up the Omada network for home with Er605 and Ss2210 switch, controlled by OC200.  Worked perfectly but then controller died and is completely offline. Purchased OC220 but the devices recognized in 220 status say "managed by others" and are not able to adopt.  Is there a way to adopt them without resetting and keeping all configuration as is for Oc220?
additionally how do I get a backup now and use that to restore settings after resetting the devices 

would this work?
 

much obliged