ok, this argue is pointless. Believe me or not, i've checked few times via both Check for update option in the app and the download section of the site.
Now can we focus on no sound capturing?
Check for update option doesn't check for betas. We wouldn't risk pushing the beta on our customers this ways since many of them use the program in production environment and stability is the key.
Regarding sound capture, we need more information. Specifically, what exactly are you trying to capture? Is it something played back on the computer (like music) or you are trying to capture microphone input?