This was a very small update, since I focused more on polishing the installer.
Download the file named pmfow_win32_installer.exe or pmfow_win64_installer.exe and install it. The other 2 files (pmfow32.exe and pmfow64.exe) are just the standalone pmfow executables for 32 and 64 bit respectively, but without the necessary dependencies (these are used by the pmfow-updater tool). Alternatively, you can use the portable version instead.