Aha! gevonden!
Most current Native Instruments products (hardware and software) are fully compatible with Windows Vista and Windows 7 64-bit editions. The only exceptions from the current product range are KORE 2 and REAKTOR 5.
Though KORE 2 and REAKTOR 5 are still 32-bit programs, they can be used on Windows Vista and Windows 7 64-bit systems as long as they run in standalone mode or are being integrated as plugin into a 32-bit host software.