Deleting only Ffsetup4.10.5.0.exe does uninstall the software. The .exe is just the installer, not the main program.
If you discover Ffsetup4.10.5.0.exe on your computer and you have no memory of downloading it, take these steps:
If you have the file on your system, you can check its properties by right-clicking → → Details . Legitimate versions typically exhibit: