Register your Quantum to your PreSonus Account using the serial number located on the bottom of the Quantum. Then purchase the "Studio One Artist 3 or 4 to Professional 4 - Quantum Upgrade" from your preferred PreSonus dealer or directly from us at https://shop.presonus.com/Studio-One-Artist-3-or-4-to-Professional-4-Quantum-Upgrade If you have trouble, contact PreSonus Support for further assistance.