To fully reset the VM hub you do a ‘pin hole’ reset. A small hole on the hub accepts a paper clip inserted to activate a switch. Do this with the hub power on and hold down for thirty seconds. Do not power off the hub. When you release the switch the hub should reboot.
Tudor There are 10 types of people: those who understand binary and those who don't and F people out of 10 who do not understand hexadecimal c1a2a285948293859940d9a49385a2
I inserted a pin, kept it there for 30 secs, switched off router and Macbook Air.
30 minutes later I restarted router. Same old same old. Passwords remained the same though under this reset all passwords are supposed to return to manufacturer's spec. Though at least my MacBook reconnected to my main network and not my guest network.... which it normally does. Grrrr.