Is cgminer supposed to be upgraded automatically when the firmware is upgraded? I just performed the firmware upgrade on one of my SP20s and it still shows cgminer 4.7.0 on the dashboard page.
Try a
Reboot from the miner's home page. That's what did it (cgminer 4.8.0) for me.
I've upgraded all my SP20's to firmware 2.6.1 and have done reboots on all of them. The dashboard page still shows cgminer4.7.0 .