UPDATE: my download actually was installed correctly, and the new DATA improves the Diagnostics of the unit, so my flashing was because of an acting up heading sensor, and that was the reason it went to flashing and the heading sensor was bad /acting up. So, the download worked (well it seems) and I had the TM checked /fixed. all is good now (it seems) the update improves the Service of the unit, helps locate the problem faster with new beeps/flashes of codes to help techs find issues faster.