The name
cudart64_31_9.dll
means:
cudart = CUDA Runtime
64 = 64 bit
31 = Version 3.1 (!)
9 = build number
So the application you tried to start refers to an older (3.1) version of the Toolkit. You may have to recompile the application so that it links to the 3.2 toolkit. There should be the “cudart.lib” from the latest Toolkit in the “Additional Dependencies” in Visual Studio.
bye