hahaha... same here.
i have also finally stopped the Max4Live device bricking my EX.
Fault seem to have been some corrupt patches in Bank 2 and 3.
I have dumped factory presets there now and re-installed the firmware with a slower speed.
and vola, i don't get error 5 and 6 anymore - and i can use the editor also.
i better stop now, it has been a good day ;-)