How do I remove a graphics settings profile?

Hello,

I set up 3 different graphics setup profiles in graphics
"themes/schemes/whatever they call it" (I can't check 'cos' I'm
on a different system at the moment) accessed by right-clicking
on desktop. I would like to remove one since 2 are identical -
and I'm sure I will need to remove more in the future depending
on what I do ;-)

I looked everywhere, and I can't find anything in any WIN dir
files nor in the registry, nor in a Google search.

Any help will be greatly appreciated.

t.