Can't find installed scripts

OS: Windows Vista 64
GIMP version: 2.6.4 (32-bit version)

Noobie question:

I downloaded and installed shadows-highlights-2.4.scm and also advancedtonemapping.scm.  I installed them at: C:\Users\Raul\.gimp-2.6\scripts
When I run the the Plug-in Browser in the Help menu, I can see them correctly installed under Menu Path: <Image>/Filters, but when I go to the Filters menu (either at the top menu bar or by right-clicking on the image), I cannot see the menu entries for any new installed scripts.
How can I apply new scripts that I have installed?

Many thanks for any suggestions,

Radzfoto