Everyone who has multiple displays, especially if the main display has a high refresh rate, please test this beta for performance. Changes were made, a user with a 144 hz monitor confirmed that his problems with a jerky mouse and low FPS were solved. Please feedback here about your results, but remember that this mode generally works slower than the single-display mode, so compare the release version of the app and this beta between each other in same mode.
To participate in beta, go to Library - Software - Lossless Scaling - Properties - Betas and select "beta" from the drop-down list. Beta version will automatically download to your computer and replace the previous one. To return the release version of the app, select "NONE".