I tried all the app versions and it didn't work. I was able to downgrade the two new Mini Pros I got today. They both had the 1.2.8 on them. I can now ride side by side with the 1.1.7 and the 1.3.1 and can tell you that the 1.1.7 is way better. It goes up hills full speed and doesn't rock you back nearly as bad as the 1.3.1 does. The 1.1.7 also is about a half MPH faster than the 1.3.1