0.5.2-dev2 was an earlier version of 0.5.2. The fix introduced in 0.5.2-dev2 that fixed it for some people is present in 0.5.2 and 0.5.3. It's no longer available because it was a temporary build and has served its purpose.
When you say "Hear Recording is completely silent inside the game", I assume you mean in the mic test page? Is playback of your recordings silent in every game mode? Weirdly, most people that don't hear any playback of their recordings also cannot hear the saved recording, but it sounds like your recording works but doesn't play.