issue with cl.exe in Visual Studio .Net

Question

When I am trying to use jhipster, I have got the following error:

C:\Program Files (x86)\MSBuild\Microsoft.Cpp\v4.0\V140\Microsoft.CppBuild.targe
ts(366,5): warning MSB8003: Could not find WindowsSDKDir variable from the regi
stry.  TargetFrameworkVersion or PlatformToolset may be set to an invalid versi
on number. [D:\scost\node_modules\karma\node_modules\socket.io\node_modules\soc
ket.io-client\node_modules\ws\build\validation.vcxproj]


 TRACKER : error TRK0005: Failed to locate: "CL.exe". The system cannot find the
     file specified. [D:\scost\node_modules\karma\node_modules\socket.io\node_modul
    es\socket.io-client\node_modules\ws\build\validation.vcxproj]

From https://social.msdn.microsoft.com/Forums/vstudio/en-US/b60f4b90-8eb5-49fb-83c9-7259a3fae66e/need-help-with-trk0005-failed-to-locate-clexe, I realized it was due to multiple versions of visual studio installation. So I want to keep only the latest version of VS and delete all others. As I am new to .Net I am confused how to delete the older version of VS and keep only the latest VS. In Uninstall programs sections there so many .NET related entries, I don't know how to delete my 12.0 version and resolve this cl.exe issue. can any .NET expert help me please.

I have two folders in my system:

C:\Program Files (x86)\Microsoft Visual Studio 12.0

and

C:\Program Files (x86)\Microsoft Visual Studio 14.0

Inside 12.0, there is only one folder Common7 but inside 14.0, I have 19 folder like

Common7, Design Tools, Shell, VC, VC#, etc

And in C \ Program Files I have 12.0 folder as shown below it also has only Common7 folder.

C:\Program Files\Microsoft Visual Studio 12.0

Under C \ Program Files, I don't have VS 14.0 folder at all.

I am using Windows 8.1.