The version 1 week ago is just the same as of today, its version 1.1. So your beep problem cant have anything to do with the version. But I can tell you, I had the same problem and searched for it for ages!

I finally found that I had a sound named "beep.wav" in one of my subfolders, and that was a very short sound that you almost did not hear. It was played instead of the default sound and so I never heard a beep until I found and removed that sound.