[atlas] Cannot change network configuration

Hello, I have recently changed the router that my Atlas probe is connected to. Since it is now in a separate subnet from my home LAN, with dedicated DHCP/RA configuration, there is no longer need for static address configuration, so I would like to revert its settings back to autoconfiguration for both IPv4 and IPv6. However, in the web interface,//"Change Probe's Network Configuration" menu is greyed out, so I cannot do anything even though the probe is up. What am I to do? Thank you, Tibor