The software is a legacy programming tool for Moeller (now Eaton) PS4-100 and PS4-200 series programmable logic controllers (PLCs). It is IEC 1131-3 compliant and primarily used for maintaining older automation systems. Official Download Sources
A central interface that assists in organizing projects and importing PLC-specific libraries to speed up development.
Version 5.0 introduced several refinements to the programming workflow, focusing on efficiency and standardized code management.
Sucosoft S40 V5.0 – Official download & licensing info