You have a MKIII with Ver. 20.1. You can update to 3-1/63 which is Ver.22 thru 32 (no more changes). You could download the OS (must be in mode2 form1) or buy a Ver.32 disk from the dealer or get a friendly dealer to upgrade it for you. Or you can send a lot and get a MKIV DVD unit. Do a search for DIY info on this forum.