Thank you for your suggestion.
I easily activate the laptop copy with the online activation. Now I have one working copy and I feel better.
I also tried to re-activate my desktop copy but I can't find a way to start the activation form.
I looked in the help but the directions for activation always start from the activation form. My copy is already activated, so the activation form does not open automatically. When I start the program it prompts: "The license has been exported. Import it again with the utility" or something like that.
I can't find a menu to obtain a activation request code or to input a activation code.
I'm located in Florence, Italy.