Originally Posted by TryHard

I think the issue that you can't down grade is because your LCD box is (now) on V3.1. Try putting it back to the V3.2, and then try downgrading the software.

If you want to do the ESC properly (and I know this works, as I've done it a few times on my esc) then you need to do it in the right order, especially if your at the latest software already... have a look on page 705 of this thread, myself and j.d.roost discuss downgrading to an older version.

Page 705

But in short, if you have V3_121129_beta on the ESC, then you need to use the V3.2 USB link, and downgrade to 'V1.1_120526', then switch to the V3.1 USB link of your choice.

HiH
Ed