You don't need a third-party tool. Use Microsoft's built-in :
The most common misconception is that Shader Model 6.6 is a piece of software you download and install, similar to a game patch or a driver update.
: Even with updated software, your physical graphics card must support the architecture. Some older GPUs, such as the NVIDIA Maxwell series or certain integrated Intel UHD graphics, may only support up to Shader Model 6.5. Troubleshooting "Support Not Detected"
Although Windows Update includes DirectX 12, the legacy DirectX 11 and shader compiler DLLs can be refreshed via the web installer.
