Just bought the Update (as i own a very old Traktor Scratch Duo Version) to Traktor Pro 3. Installed it and then wanted to activate via Native Access by "+Add Serial" with the Traktor Pro 3 serial number shown via this link Produkte & Serien-Nr. (native-instruments.com) in my NI account. After clicking "Enter" Native Access shows me "Invalid Serial". How is this possible, what to do now?