Hi Fabio,
Yes, I installed ISO Disc Images recently for Cubase. Must have been what the issue was.
Steinberg took remote-access of my PC today and resolved it for me because I wanted to make sure that the problem would definitely get corrected.
I was also informed that Steinberg may be releasing a new dongle (maybe early next year) which is going to do the same job but much smaller in size.
Best,
Paul