Hi all,
Well, at last, I managed to find the upgrade here and got a reply from Thomann and a few other dealers and we'll see who I will purchase it from.
One thing that I don't like is that I will have to go through the same complicated procedure again if I upgrade to an Audya 5 wich I have been looking at.
Also, noone asked for my Audya's serial number and I am wondering is it really tied to it now then and if I really need to get another USB pen drive if I upgrade to the Audya 5 from the Audya 4?
Many thanks!