Hi Fran Blan
sorry to hear about the presets loss!
We always advice to have/create backups before doing any update, pretty much like it happens on computers. Bad things can always happen and may only affect some machines. I have updated my unit and had no presets loss. So, it's something that happened for some special reasons.
There is no way you can recover those presets, unless you have a copy of them.
Backups can be done on CFCards and on computers or, better, on both.
all the best
I
