Please help! I have had a Pronto Pro RU980 for a few years and despite a few minor issues, it has been working well. I recently upgraded the firmware to version 3.8.17. (I hope I have downloaded the correct upgrade for my Pronto???). I now get this problem:

I create a custom button and learn a custom IR code into it. When I test it via the Pronto Edit software (Test IR) it works. At this stage the Pronto is connected to my laptop via USB cable. I then download/upload the new configuration to the Pronto successfully. I unplug the Pronto from the laptop and try the button out. Now it would not work. I have tried to learn the IR code directly onto the Pronto (without editing software) but it gives the same problem. Any ideas?

PS Where can I find the previous firmware version?