The safest way is the direct link: github.com/nbats/FMHY (FMHY stands for "Free Media Heck Yeah," the successor/expansion of the original r/Piracy Megathread) or the official r/Piracy wiki link.
Inside the Megathread, you will see a Table of Contents. Click on "Software" or "Windows Software." rpiracy megathread portable
Even trusted releases can get false positives. Hackers use packers that antivirus flags as "Riskware" (which is usually fine) or "Trojan" (which is not). Upload the .exe to VirusTotal. If it shows 0/60 detections, you are golden. If it shows 2/60 (usually "HackTool" or "Keygen"), that is normal. If it shows 30/60, delete immediately. The safest way is the direct link: github
Oracle VirtualBox is free. Create a Windows VM. Run the portable app there. Does it phone home? Does it create odd network traffic? If it works fine, move it to your host machine. Hackers use packers that antivirus flags as "Riskware"