Screen share guard for games at very high frame rates. When a game keeps the graphics card too busy for the share to keep up, the app can step the share down in place instead of stalling. It is off until it is switched on for a server.
Clearer share diagnostics: pqpShareHealth() in the developer console shows the video codec, whether encoding is hardware or software, frames per second and what is limiting the share. On Windows, the app now raises its own priority while a share is live.
Windows may show a SmartScreen warning, because the installer is not yet code-signed. Choose More info, then Run anyway.