Users typically disable VSync in-game and use a shortcut (like Ctrl+Alt+S ) to trigger scaling.

No comprehensive security or technical "report" for a file named Lossless.Scaling.Build.9275497.rar exists from official sources. This file appears to be an unofficial, third-party redistribution of the Lossless Scaling utility commonly found on Steam. Security Warning

If you are looking for information on what the software does, //www.reddit.com/r/OptimizedGaming/comments/1jjl1t0/ultimate_lossless_scaling_upscaling_resource/">Reddit's OptimizedGaming :

Recommended to have at least 30 stable FPS before activating.