Searching should result in more info however, you tap your wideband logging wire into the your reference wire for either EGR or AC.
Then when logging you Lof your AC or EGR signal which will then be your WB reference.
As for HPT fixing this; I think (this is just MY OWN Speculation )its due to being a Hardware issue, Maufacturer changed up the Interface.
Now they will need a Firmware update, which if done incorrectly can render your unit inop.
When 2.24 comes out, it will also require a firmware update, so HPT will do it all at one time in order to cut down of corrupted units.
AGAIN this is just MY OWN Speculation