Stoll (Karl Mayer) uses a for software licensing. Even if you install the software, it will run only in "Demo Mode" (where you cannot save, export, or generate machine code) unless a specific USB dongle is plugged into your PC. These dongles are unique, encrypted, and sold only to verified machine owners.

for their flat knitting machines. While the full software is a premium product requiring a paid license and a physical smart card or license key to operate, there are specific official ways to access it. Availability and Official Downloads The full version of Stoll M1plus is

Stoll software is professional-grade and protected by a "Smart Card" system.