simatic-s7fprojx-v5-5-sp13-upd1.exe is the installer for the SIMATIC S7 F ConfigurationPack V5.5 SP13 Update 1

What it likely is

, which is the programming and configuration tool used to design safety-instrumented systems (SIS) on the SIMATIC S7 platform. The Role of S7 F Systems

• 8. Summary Table – Is this for you?

  Administrator rights + disabled antivirus (during install)

  The installer writes F‑specific registry keys and copies .dlls into Siemens\Step7\S7F . Overzealous AV can quarantine FServer.dll .