DIGSI 4.95 is not designed for the newer SIPROTEC 5 series. For SIPROTEC 5, you need DIGSI 5.
Complete Guide to Siemens DIGSI 4.95: Features, System Requirements, and Installation Siemens Digsi 4.95 Download
Before downloading and installing DIGSI 4.95, ensure your engineering workstation meets the following hardware and software specifications: Hardware Requirements DIGSI 4