Thanks FurryNutz.
Manual says to use http://192.168.0.50
...This just gives me a blank browser page.
D-Link have kindly sent the installation wizard software on CD-ROM, but unfortunately, that is for PC and I use Mac. When contacted, they say they do not have Mac software to do the job.
Will contact D-Link again to find alternative IP addresses to try to connect with the DHP-306AV. Apparently, http://192.168.1.50 can wok, but that does not work for me either.