My DP32SD was on version 1.3 when I got it and when I checked I found the latest version was 1.5. My problem then was I do not hve a computer, but I do have an iPad Pro. So after a bit of thought and reading the manual I realised you do not need a computer to upgrade the firmware. It was a bit fiddly but it can be done by formatting an SD card on the DP and then transferring the file to the relevant folder and following the manual for restarting. It worked flawlessly and I am now on the latest version. If anyone needs to do it this way let me know and I will post the details.