Today I connected my laptop up to my Focus Jam2 via the SM-PCE1. I used the Etube software as the interface to access the bike details etc. As I thought the settings you can change are the same as via the phone app. You can however get more details from the bike as seen in Shauns post earlier.
The circumference on my bike is factory set and is 2300mm.
I then connected via Freemax software and lowered the assistance level on ECO to 40% from 60%, set trail to 50% and boost to 100%. I have left all the torque levels at factory defaults.
If you wanted to change the wheel circumference you would have to pay for the minimax software, This is per bike and over £100. You can also raise the speed limit to the USA level via a toggle if you wanted. I'm only interested in having the motor cut out at the correct speed but this is too much for me to pay for such a minor niggle. I do believe that Shimano should allow us some adjustment for different tyre sizes, I'd imagine a 100mm would suffice.
I'm not sure if the dealers have access to different software.
Hmm, doesn't really make sense on my bike then, I have 29 inch wheels with 2325mm circumference so my speed should be quite accurate...