Compile a C++ project under new CUDA version

Hi,

I have a C# Solution, in which includes a C++ project, compiled under CUDA 5.5.
Recently I installed CUDA 6.0, but I don’t know how to compile my program under CUDA 6.0.

In project properties, all refer to CUDA 5.5 directory and they are not writable to change.

Regards,
Arshia