Because "SetEdit" covers many different satellite receiver brands (Dreambox, Humax, Samsung, etc.) and the software is often updated in small incremental builds, "4a" likely refers to a specific version build or a file classification.
: Prevents the system or other apps from resetting your manual changes. For example, it can keep notification snooze times active even after a device reboot. 4a feature pack for setedit download verified
Run a virus scan on the downloaded file to ensure it is free from malware. 4a feature pack for setedit download verified
Edit the Secure and Global tables without manual ADB commands every time. 4a feature pack for setedit download verified