05-16-2016 16:47
05-16-2016 16:47
05-16-2016 22:23
05-16-2016 22:23
Your app should tell you if an update is available and step you through it. However, if you'd like to try manually then this guide should help:
05-17-2016 09:06
05-17-2016 09:06
If you are using Fitbit Connect, there is an option to "Check for device update"
Hope this helps, Eric