I am trying to upgrade our project to 4.10. First I right click uproject file in Window File Explorer, switch Unreal Engine version to 4.10. Then clicking Generate Visual Studio Project File only gives me VS2013 solution file.
My question is how I generate VS 2015 project file.
I did the same thing as you. I created C++ project in UE 4.9. Code was compiled in VS 2013. After this i changed Unreal Engine Version to version 4.10 and generate new solution. Now, the code is compiled with help of VS 2015.