I've been using firewall to block off connection, not only it's Curl.exe but also wibu and codemeter and archicad component trying to connect and who knows what information is sent. I also got contacted once by one of their contracted software licensing companies to scare me into buying it. I kept telling them I am just a student trying to learn the program but they kept insisting that I have to buy it. So lesson is block it off or you'll hear from them too.