OK, before using this wireless access setting - 'allow new devices (by registration)' - I had a long list of devices connected.
I implimented the 'allow new devices (by registration)', changed Router Name and Key, then deleted all devices in the 'Devices' list, new devices after that joining - after the 'search for wireless devices' 60 second 'joiing window' was opened.
It appears how ever that deleting a name from the devices list - will not force a new reconnection.
Any one have some experience with this 'feature'.
Thanks