I had trouble with Don't Starve aswell
When I launched it from steam nothing happened after configuration
So I've gone on the /bin folder and tried to execute it : Xinput_1.3.dll missing.. fine I've extracted it from DirectX and add it on SysWoW and Sys32 and then Don't starve launch but "initializating error" and I just found it this topic and it works !
Even if my dxdiag told me than all was fine before...a
I've been irregularly searching for a D3D Compiler fix for what might be over a year now. I'm so relieved that the search is finally over and that I can play some games on Steam that I was eagerly awaiting.