public class AppUtils{

  public static changeIconToPro(Context mContext){
     getPackageManager().setComponentEnabledSetting(

          new ComponentName("com.pytenlabs.mailcastr", "com.pytenlabs.mailcastr.MainActivityPro"),

                PackageManager.COMPONENT_ENABLED_STATE_ENABLED, PackageManager.DONT_KILL_APP);


            try {
                getPackageManager().setComponentEnabledSetting(
                           new ComponentName("com.pytenlabs.mailcastr", "com.pytenlabs.mailcastr.MainActivity"), 
                                               PackageManager.COMPONENT_ENABLED_STATE_DISABLED, PackageManager.DONT_KILL_APP);
                 } catch (Exception e) {
                               //oh oh
                 }


   }
}