I have installed the app on my Lumia 925, which is fully up-to-date with the latest firmware. The app crashes everytime on trying to open it, even after installing the latest update. It is a completely useless app that is broken and does not work. What an embarrassing start for the launch of Opera Mini beta on Windows Phone. Back to IE11 until you can get the app even running on a top of the range Lumia 925.