Can't access Zee S2 on network

I've just set up my Zee S2 on my network and it was working great. Unfortunately, I then entered the network settings on the web GUI and unchecked "DHCP" to set a static IP address. I restarted the Zee S2 and now I can't access it on my network. The find.homeseer.com URL locates my Zee S2 at the same IP address, but clicking on the hyperlink fails to load.

How can I reset my network settings? I've tried plugging in a USB keyboard and hitting "r" then enter when the Zee S2 light was yellow, but nothing happened. Thanks!