If you experience stuttering after the update, consider clearing your DirectX shader cache through Windows Disk Cleanup to allow the game to rebuild them for the new version.
Before applying any manual update, copy your save folder (usually found in %LocalAppData%\ReadyOrNot\Saved ) to a safe location. File: Ready.or.Not.v21874.zip ...
While often focused on "under-the-hood" improvements, this specific version addresses several community-reported bugs and performance bottlenecks. If you experience stuttering after the update, consider
Move the extracted files into your main game directory. When prompted, select "Replace the files in the destination." Move the extracted files into your main game directory
Run the game executable as an administrator to ensure all permissions are granted for the new build. Minimum System Requirements OS: Windows 7, 8.1, 10 (64-bit) Processor: Intel Core i5-4430 / AMD FX-6300 Memory: 8 GB RAM
NVIDIA GeForce GTX 960 2GB / AMD Radeon R7 370 2GB Storage: 50 GB available space