I recommend this one.
This will download an installable file. Just click the link. You will then need to install it.
I also found my son has been using modzilla firefox and was already on the computer – does work as an FTP program?
Firefox CAN have an FTP function, but you have to add it with an add-in.
It’s actually pretty useful. You can FTP without having to leave your browser. Now that is neat.