Would you like a step-by-step tutorial for extracting source code from a protected .s7p using the 2021 version?
S7 Can Opener is third-party, unofficial software often shared on automation forums (like PLCs.net, MrPLC.com, or GitHub). It is not produced, endorsed, or supported by Siemens. Using it may violate software license agreements, and it can corrupt project data if misused. Always work on backup copies of your PLC projects. Official Siemens tools (STEP 7, TIA Portal) are the recommended way to open and edit .s7p files.