Disabling Calm upgrades


Hi im using calm in an old phone with android 4.0 (Samsung GT-[I]S5301[/I]). Im having difficulties running the last calm version, it works, but after the initial quiz for calibrating the muse, thinking about street names, places, etc. When the actual session is going to start the app gets closed. I solved this downloading a 1.5 Calm apk. But when i use it, it gets blocked asking for an update, how could i bypass this menu? if close wifi, the upgrade button doesnt displays, and session starts fine.