I found the reply here http://zorro-project.com/faq.php
to my first answer

"If I donate a strategy, a script, or money, and get Zorro S, does this also include future updates to Zorro S 1.50, 1.60, etc.?"

"Yes, up to Zorro 1.99."

But still I do not understand the utility of the option: "Download Protection (Duration: 12 months)"