Hi,
Delete the DLL's local copy (i.e., in the Game folder).
Rename c:\Windows\System32\d3dx9_43.dll to d3dx9_43.dll.old.
Then download d3dx9_43.dll and place it in Windows\System32.
File info:
MD5: 7160FC226391C0B50C85571FA1A546E5
SHA1: 2BF450850A522A09E8D1CE0F1E443D86D934F4AD
SHA256: 84B900DBD7FA978D6E0CAEE26FC54F2F61D92C9C75D10B35F00E3E82CD1D67B4
VT link: https://www.virustotal.com/gui/file/84b900dbd7fa978d6e0caee26fc54f2f61d92c9c75d10b35f00e3e82cd1d67b4/detection