When I updated via the web interface it initially went through the motions of doing the update, displaying the red progress bar, but ended with a message along the lines of 'there was a problem, please try again'. Repeated efforts got me nowhere until it finally, and unexpectedly, successfully did it on what felt like the 30th attempt!
Someone on here also reported a similar experence and found their way to a successful update was to choose a time to install from the drop-down menu that appears when you get the message that there is a new firmware available, rather than the 'install now' option.
It shouldn't be this difficult, and I agree the app can be a bit frustrating (I'm on iOS). Hopefully you are just experiencing a server-side glitch and you will eventually be able to update.
Hopefully some others on here may spot this thread and have some other ideas. Good luck!
