I have just purchased this upgrade. I’m going to leave it a few days before I install it because of all the hoo-har going on. I’m keen to know your progress!
I got this mail from support after contacting them. I translated it by myself, so sorry for mistakes.
"Thanks for your call!
Unfortunately you cannot upgrade from Artist 10.5 to Pro 11 at this moment. We are working on this problem. As soon as we know that this problem is solved we will let you know. Please be patient.
You can try to upgrade Cubase with the existing activation key today and tomorrow with the eLicense Control Center.
For me it still does not work. The problem is not solved. I mailed them again, asking for an additional license for artist 10 (not 10.5) because I’m sure this would be a good workaround for users that upgrade vom artist 10.5 to pro 11. No answer so far.