Stoll (now part of the KARL MAYER Group) does not offer the full M1plus suite as a "freeware" product for public use.
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 m1 software free download
You can download the software files from the official portal, but you will need valid credentials or hardware to complete the installation: Stoll (now part of the KARL MAYER Group)