Help system in VS2012 screwed up?

I have Intel Fortran Composer 2015.2.179 installed in VS2012 pro.

I an not a regular user and have not used it for a while and on opening it and hoping to do a Help search for help on some Windows API functions,
I find I can only select Intel Compiler and Libraries help and its search is restricted to Fortran stuff. If I type in 'SendMessage' or any other Windows API function name or Windows resource name I get a null return.

I recall in the past having access to a much wider search ability, so I am wondering if my help system has been screwed up since I installed the latest composer version.

I recall in the past being able to choose the help system before, but that option appears to be missing from the Help menu in VS2012 now.

Please can you update me on how I might be able to merge the Intel Fortran help with the wider API help that typically was available in the old Visual Studio Compaq Visual Fortran Help.