Commented Unassigned: CUDA directory not found again [1141]

I'm sorry to repeat this question, but I haven't found an answer that works yet.

I've installed CUDA 7.0.
nvcc is at C:\Apps\cuda_v7.0\toolkit\bin\nvcc.exe
CUDA_PATH = C:\Apps\cuda_v7.0\toolkit
CUDA_PATH_V7_0 = C:\Apps\cuda_v7.0\toolkit
Path includes C:\Apps\cuda_v7.0\toolkit\bin

I've downloaded CudafyV1.29 and unzipped it into C:\Projects\cudafy\CudafyV1.29

When I run C:\Projects\cudafy\CudafyV1.29\bin\CudafyViewer.exe
and 'Check for CUDA' it says

Found 1 devices.

Name: GeForce GT 555M
Compute capability: 2.1

When I press 'Run CUDA Test', it prints

Platform=x64
Checking for CUDA SDK at nvcc
CUDA SDK Version=
Attempting to cudafy a kernel function.
CUDA directory not found.

When installing CUDA, I didn't select 'CUDA Visual Studio Integration'.
I'm using Visual Studio community 2015, which has C# and C++ installed. I can't find cl.exe anywhere, though. (That's mentioned in some responses to this problem, but that's not the error I'm seeing.)

I've looked at the manual at http://www.hybriddsp.com/cudafy/CUDAfy_User_Manual_1_22.pdf and don't yet see my mistake. I've rebooted more than once. I can run nvcc --help and see lots of output. I haven't tried compiling any of nvidia's examples.

It would be helpful if CudafyViewer was more explicit in the messages that it prints, for instance, by printing the name of the environment variable it uses to look for nvcc.

Any suggestions? Thanks.
Comments: ** Comment from web user: balu92 **

The problem is with Utility.ProgramFiles(). For me it returns with "C:\Program Files (x86)", but it is in "C:\Program Files". And CompilerHelper.Create() uses this path to get the path where CUDA was intalled:
```csharp
string text = Utility.ProgramFiles ();
string gpuToolKitDir = text + Path.DirectorySeparatorChar + CompilerHelper.csGPUTOOLKIT;
```
where:
```csharp
CompilerHelper.csGPUTOOLKIT = "NVIDIA GPU Computing Toolkit" + Path.DirectorySeparatorChar + "CUDA"
Path.DirectorySeparatorChar
});
```

After editing Utility.ProgramFiles() to return a hard coded: "C:\Program Files" got other problems now. So back to the drawing board.