: If the app crashes on launch, navigate to the Profiles folder within the D3DOverrider directory and delete all configuration files inside to perform a "clean boot" of the program. 4. Modern Alternatives

Windows 10’s “Fullscreen Optimizations” can interfere. Disable per game:

D3DOverrider is a legacy utility that was originally bundled with . It is primarily used to force Triple Buffering in Direct3D applications