Press your device's Home button. Press your device's Menu button. Tap Settings. Tap Application Manager. Scroll to find the app you want to clean up, then tap the app icon. Tap Force Stop. Tap Clear Data. Tap Clear Cache.
Just got this PM as you can see the URL isn't to Mt.Gox. If you fell for it you should be ok if ou have 2 factor authentication but still change your passwords.