SharePoint Designer 2010 is a 64-bit application that provides a comprehensive set of tools for designing, building, and customizing SharePoint sites. The application allows users to create and edit SharePoint sites, lists, libraries, and workflows using a variety of tools and features. With SharePoint Designer 2010, users can create custom workflows, design and implement data validation, and create custom Web Parts.

Many developers find the 2010 interface more intuitive for quick CSS tweaks compared to the 2013 version, which removed the "Design View" feature. Common Troubleshooting Tips

Microsoft SharePoint Designer 2010 (SPD 2010) is a free, advanced HTML and workflow editing tool for on-premises environments. The 64-bit version is designed for systems with more than 4 GB of RAM, improving performance when working with large sites, workflows, or data views.