Didn't see this until today, but the "use this cars settings for all cars" button on the car set up page is not working. Nothing I do will copy the settings from one car to another, so either I'm doing something wrong, or something is not working correctly.
I wanted to change the "Power control" settings for one car, and then copy it to all cars, but I cannot do so. When I select one car, or many, the "use this cars settings for all cars" button does not effect the changes. Note that this is not the "Use this on all cars" button, which does work for fuel tank and burn settings in that little section of the screen.
I discovered this when testing the software at my friend's house. It had never run there before, and so all the settings and options were new. We had to tweak the fuel burn settings to get what we wanted, but could not copy them to multiple cars. That's when this bug was found.