Hello,
I recently upgraded the FW on my Almond+ to R070 through the web interface.  I said to save the configuration during the update.
After the update, everything was fine but I noticed that I still had a guest network enabled on 2.5G.  Through the web interface, I went in and disabled this guest network.  After I did this, the entire 2.5G network went down and refuses to come back up.  I've rebooted the router, re-flashed R070 (saving config), re-enabled the guest network, and disabled the network and re-enabled it.  Nothing worked.
Stupidly, I tried the same process on 5G and the same thing happened.  Now I have no WiFi whatsoever and my wife isn't too happy.
OpenWRT shows me this:
SSID: <ssid_5.0>
Mode: Master
Channel: 36 (5.18 GHz)
Bitrate: ? Mb/s
Wireless is disabled or not associated
SSID: <ssid_2.5>
Mode: Master
Channel: 1 (2.41 GHz)
Bitrate: ? Mb/s
Wireless is disabled or not associated
Any suggestions?  I am going to try going back to R069.  Hopefully that works.