SyntaxError: Use of const in strict mode. (previous answers do not work)

Using Win10 Pro / VS2015 with a 'website' project (not asp.net, basic website)

When attempt to save/reload gulpfile.js I receive the error message (from Task Runner Explorer/output)

SyntaxError: Use of const in strict mode.

In the present case it is choking on 'gulp-changed'

I have looked through the answers and comments available:

• SyntaxError: Use of const in strict mode

• SyntaxError: Use of const in strict mode?

  1. I have updated my version of node to the latest: 6.10.30
  2. I have cleaned the cache (npm cache clean -f)
  3. I have used 'which node' to determine that node is pointing to the installation of the latest install.
  4. "n" does not want to install on Windows (?)

via Cos Callis