Hi Darryn, I first updated the software without any mention of the firmware. It didn't seem to change any of my power and cadence issues. Then I read somewhere that you should do the updates with a metre between the ant+ attached computer and the trainer hub. So I deleted the software on my laptop, and re-installed whilst approx 1 metre away from the trainer. After installing the software, I then got a message about new firmware being available ( perhaps after launching the new software version, but I can't remember when it popped up tbh). After downloading it, I launched a session and it seems to have corrected bad cadence ( down from 130 to the 90s) and power ( previous software 20 min ftp was 210W, which seemed real low, whereas after new software I did a 17.5k velodrome session at 257W, which I was much happier with!). Hope this helps.
Did you ever solve your gradient and power issues? I saw them on pages 80+ of this thread or so, but couldn't read all the way through- I'm new here!