Download the game fresh. This guarantees you get the official re5dx9.exe (Version 1.2.0) patched for GFWL removal.
Use Revo Uninstaller or the standard Windows uninstaller to remove Resident Evil 5. Delete the Documents\CAPCOM\RESIDENT EVIL 5 folder manually. Resident Evil 5 Re5dx9 Exe Download
Download and install the DirectX End-User Runtimes (June 2010) from Microsoft's official website. This installs the legacy d3dx9_41.dll and d3dx9_42.dll files that RE5DX9.exe requires. The "Wrong Save Data" Crash If you previously played the game using the DX10 launcher and switched to DX9, the save files conflict. Download the game fresh