Install Xamarin on Visual Studio 2015 with Xamarin on Visual Studio 2013 already installed

Question

I have Xamarin installed on the Visual Studio 2013 on Windows Operating System. It works fine.

There is Xamarin tools in VS2013 as follows:

My problem

Answer 1

First try to uninstall all the other versions of Visual Studio (VS) 2013 in this case. Then try to reinstall Xamarin.