PowerFLARM protocol version 6

I'm playing with my PFB (on ground near big airport) and while I'm getting good Mode A/C/S hits out to 5NM, I have yet to get an ADS-B return. Is there some special setting in the FLARMcfg file that's needed to enable ADS-B?

Also, in the DataportManual v6.00E, it talks about enabling protocol version 6 via the $PFLAC,S,NMEAOUTn,61 command (n=1 for RJ45, n=2 for Dsub9), but it also states that

"Warning: Values = 40 are volatile and not stored in EEPROM. They will revert to (Value modulo 10) at the next powerup or reset. Example: 43 reverts to 3. This is to make sure that no FLARM accidentally runs a recent version of the protocol if a legacy display or other device is connected."

So, my question (finally!) is: Do we need to enable protocol 6, and if we do, is it reset everytime back to the default? Or should we just leave the NMEAOUT command to 1 for both ports 1 and 2?

Fun stuff, kinda...

Kirk