Yes it sounds like it's the status string. Only thing was it started misbehaving after it had been connected for 5-10 minutes. Sometimes the chrony would register a shot (showing velocity on its LCD) but no response from the software. Other times the program would register it. I couldn't detect a pattern to this, only that for the half dozen shots I tried over hyperterm there were no glitches.
I'd just like to say the cable is a cracking piece of hardware that now lives in my Chrony when folded. The software also shows every sign of being a superb piece of kit. Keep up the good work!
Next on my wish list is a wireless sender so you can sit on the range line next to your lappy while the chrony sits anywhere you like downrange and sends its readings straight to the PC.