It looks like I got it working. I didn't see any change when I extracted the www files directly to the sd card folder. I was poking around at the rest of my settings and saw that the ethernet port I had bridged with the wifi port did not have internet access. I deleted and then recreated the bridge and this time checked both the Local Area Connection and the Wireless Network Connection boxes as adapters I wanted to use to connect computers on the network. The instructions I used yesterday made me think I only wanted one of those checked. As soon as the bridge was created I typed the IP address into my browser and the duet web control came right up.
Thanks for the help. Now I need to connect motors and heaters and see if I can revive this printer!