Look for the file with the highest date stamp and the word GUI in the title. Do not download the NWSAP (Network Stand-alone) files unless you are an administrator. The standard user file is roughly 1.2 GB to 1.8 GB.

SAP GUI 7.70 is a significant milestone for SAP users. Released as part of the SAP Front-End Components 7.70, this version represents a major leap in user experience, introducing a redesigned interface, high DPI support for modern monitors, and a host of accessibility improvements.

Note: This is the successor to the older "Service Marketplace". Bookmark it.