How Can I Effectively Use the KM Window Switcher?

Left and Right Arrow keys.

Does not work for me on Sierra or Mojave – it just scrolls continuously in down the window list.

Yep.

I did get it to work on both Sierra and Mojave with Ctrl-Tab as the hotkey by:

  • Activating the hotkey.
  • Releasing the Tab key.
  • Pressing the Shift key.
  • Pressing the Left/Right Arrow keys.

-Chris