Use a tool like WinRAR or 7-Zip to extract the contents.
The GraphPad Prism 9 software is available through several third-party, potentially unauthorized, distribution sites that offer a compressed .rar file containing the installer and keygen (license generator) for Windows and macOS. Download Prism9 rar
Run InstallPrism9.msi (Windows) or the extracted .dmg (macOS). Use a tool like WinRAR or 7-Zip to extract the contents