Since Soundsource does not appear in the app store keeping track of updates is not easy even with auto update enabled. Always update through the application update tab. I had trouble doing it from the site for some reason. It loaded OK but at the time the new copy would not replace the old one even when told to do so.
SoundSource 5.7.2
October 10, 2024
This includes and update to their Audio Capture Engine (ACE)
in the settings tab: