Add Style after adding plug-in.. Plug-in not working

[FCDobbs]

Using "Plug-in Manager" (in ACP), I click on each template indicated for that plug-in
(essentially invoking EDIT),
and I see the code shown for implementing the plug-in in the template.

It does not show where the code goes.

So I need to examine that Template in a Style where the Plug-in DOES work,
to see where the code has been changed, and then make that same implementation
for the new Style. (I guess).

This does seem like a lot of work.

That's why I was asking if I was to re-install the Plug-in, if that would make all the
changes for me?