The official SinuTrain for SINUMERIK Operate Version 4.8, which was widely available around 2021, can be accessed through specific Siemens portals
If license missing → use License Manager to install .lic file. sinutrain student version download 2021
By using the 2021 student version, you are not using "old" software—you are using proven software that runs on millions of factory floors worldwide. Master this, and you master the industry standard. The official SinuTrain for SINUMERIK Operate Version 4
Siemens maintains an FTP-like structure for old versions. Go to the "Download Archive" and filter by "Software Version" -> "2021." Some advanced machine dynamics and physics simplified