"J. P. Gilliver (John)" wrote in
:

"Properties Plus" http://www.brothersoft.com/propertiesplus-5394.html is
one such (adds itself to right-click just below "Properties", as you
might expect).


Exactly so. I never found a better tool for it than that one. It's a
permanent part of any install I do. Extension changing, handling of files via
their shortcuts, and several other good things in it too. About 350 KB
installed, and worth it all.