Login to Basware Marketplace Administration/Commerce hub with your Basware account at the following address:
UK Public Sector Suppliers: https://buyers.mpuk.basware.com/admin/login/auth
Global Supplier: https://marketplace.basware.com/admin/login/auth
Once logged in, select the Product Manager tab at the top of the screen:
From Product Manager click the "Download Super Content Loader" button, this will download the latest version of the content Loader to your browsers download folder: