Use InAppBilling to check for updates

distriqt.extension.inappbilling.inappupdates.as

InAppBilling.service.inAppUpdates.addEventListener( InAppUpdatesEvent.CHECK_APP_UPDATES_SUCCESS, successHandler );

// Perform the updates check
InAppBilling.service.inAppUpdates.checkAppUpdate();


function successHandler( event:InAppUpdatesEvent ):void
{
    if (event.updateAvailability == InAppUpdateAvailablity.UPDATE_AVAILABLE)
    {
        // An update is available
        trace( "info: " + (event.updateInfo == null ? "null" : event.updateInfo.toString()) );
    }
    else 
    {
        // No update available
    }
}
// com.distriqt.InAppBilling