Unable to rollback firmware

I am looking at KB article 5800 and trying to downgrade my firmware.   I have firmware 1.04.10_B and am having issues with PlayOn.

In my settings menu, I do not have an icon for “New Firmware Found”. 

Any suggestions for how I downgrade?

http://wdc.custhelp.com/cgi-bin/wdc.cfg/php/enduser/std_adp.php?p_faqid=5800

Follow the instructions fully on the page above.

You must download the rollback firmware from the page above, either 1.03.49_B or 1.03.29_B. These firmware downloads have been modified to allow you downgrade without any problems.

Add the 3 files within the zip file to the root of a USB fash drive and plug it into the WDTV. The firmware found icon should then appear.

I assume that you have a Live Plus as you have mentioned the _B firmware. If you have a Live use the _V firmware.