It is a .bat file (batch script), which should be run as an administrator.
You can find the Learix FPS tweak file on GitHub, specifically within user Batlez's repository . Download Program Learix FPS
Learix boosts your in-game FPS and general computer performance in day-to-day tasks. This is the batch file from the tweakcentral. It is a
Adjusting in-game settings (lowering shadows, reflections, and anti-aliasing). If you are looking for a game with a deep story, Learix boosts your in-game FPS and general ... - GitHub This is the batch file from the tweakcentral
Learix FPS is a popular, open-source Windows batch script designed to optimize system performance and increase in-game frames per second (FPS), often used for competitive games, not for playing a game with a "deep story."
The script is over two years old and may not be optimized for current Windows updates.
Updating graphics drivers (NVIDIA GeForce Experience or AMD Adrenalin). Using Windows "Game Mode".