Simplix_sot.dll -

Right-click the file (if you can find it) and select Properties . Check the "Digital Signatures" tab to see the verified developer.

While the main tool is an .exe , it extracts various support files during operation. If you are using this tool and seeing a .dll error, it usually means the pack is corrupted or being blocked by an antivirus. 3. SOS.dll (Debugging Extension)

Often associated with various third-party software or older gaming applications.

Since the name is non-standard, use a tool like Malwarebytes to ensure it isn't a malicious file masquerading as a system component.