Thanks,Tony, for your comment!
I wanted to copy everything to my PC just in case anything goes wrong in the future – but the copying didn't succeed.
I also found out that USB stick does not contain the entire backup either.
I believe the DVD or USB stick with complete backup should be a part of every Ketron shipment, or even better, the SW should be accessible on some FTP server.
It is frustrating to disable a new keyboard like this but I hope to restore my Audya soon with the help of Ketron guys or my dealer.
I have been a very satisfied user of SD1 for 10 years up to now and I must say that those few hours of playing Audya before I started to backup the drive was a pure pleasure!
I am also glad to be a part of this very helpful forum!
Thanks.
Regards,
Luka