S3Express is very easy to install and it will work out of the box. Just download one of the installers above (32-bit or 64-bit) and run the installer. S3Express will be installed in its own folder, under "Program Files", unless otherwise specified. Then click on the S3Express icon to start the command line utility. That's it! The entire installation is less than 8MB in size. No other libraries or software required.
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