dxwebsetup.exe it is a DirectX Web Setup file, it checks if your system is up to date with DirectX.

<t>I had a problem with version 5.6 using Windows 10 64 bit with error message "DirectX/OpenGL". I installed dxwebsetup.exe, JavaSetup8u151.exe and SweetHome3D-5.6-windows.exe. The problem was solved. I am using HP Pro-book 650 G1, I was running Windows 7 32 bit then upgraded to Windows 10 64 bit ...