Change Directx Version Windows 10

HELP!!
I'm trying to downgrade Directx12 to Directx11 on Win10.
The only way I've been able to even find the Directx11 download is through a Windows Vista .msu Service Pack. I figured I could just run it in compatibility mode, but no dice. You can only run .exe & .msi files in compatibility mode.
Being the knucklehead that I am, I've already deleted the regeedit files for Directx12, (minus Default Reg_SZ). *Without setting a system restore point* derp.
Does anyone know how I can download the vista .msu for Directx11 on a windows 10 operating system? .. or any other way to downgrade?

If it's supported, how come I'm having such a hard time getting it?

Download Directx For Windows 10

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Directx 11 Download Windows 10

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How To Change Directx Version

Oct 02, 2019  Switch DirectX 11 to 9? How can I switch to directX 9? I have Windows 7 Ultimate 32 bit, and I want to switch from dx11 to dx9. Or how can I delete directx 11 properly and then install directx 9? This thread is locked. You can follow the question or vote as.