On some network setups — machines with several network adapters, a VPN connected, or a router that doesn't answer the way RemSound's UPnP library expects — ticking the UPnP box could freeze RemSound's window. Audio kept flowing (so peers stayed connected), but you couldn't open the window again, the system-tray hotkey stopped responding, and the only way out was to end the RemSound process from Task Manager.
RemSound was running the router-discovery step on the same thread that draws the window, so when discovery couldn't get a quick answer from the router it blocked the window until it finished — which on some networks meant forever. v3.0.1 moves that work off to a background thread, so the window stays responsive while RemSound looks for the router. The live status label in Preferences still updates as discovery progresses — that was already on the right thread.
The same fix is applied to the three places UPnP can kick off: at app startup (when you have UPnP ticked from a previous session), when you tick the box in Preferences, and after a sleep/resume (when RemSound re-pokes the router in case the mapping was dropped).
Same wire format as v3.0, same codec list, same everything else. If you were already running v3.0 happily without UPnP turned on, this update fixes a problem you may not have hit — install it at your leisure.
3. Extract the zip **over your existing RemSound folder**, overwriting program files when prompted. The zip is program files only — it will not touch your profiles, settings or recordings.
4. Run `RemSound.exe`. Press F1 for the user manual.
**v1.9, v2.0, v2.1, v3.0:** Help → Check for updates works — it will fetch and install v3.0.1 automatically. If you've ticked "Check for updates on startup" and "Silently install updates", v3.0.1 installs itself shortly after launch with a brief notice; RemSound then reopens on whichever profile you were running (new in v3.0).
**v1.8 and earlier:** the auto-updater in those versions has a fault that prevents it from installing updates, so Check for updates will download v3.0.1 but not apply it. Install v3.0.1 by hand using the steps above — just this once. From the build you install onward, updates are automatic.
