Ak to chce ešte niekto skúšať, potom z oficiálneho zdroja:

How To Use:
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NotifyKeyboardLights.dll should be copied to the Plugins sub-directory
where PopTrayU is installed. Run PopTrayU, and on the Options screen, select
the "Plugins" category. Make sure "Keyboard Lights 2.0" is checked so that
the plugin will be running. Right click on "Keyboard Lights 2.0" and select
"Plug-in Options" to configure options for Keyboard Lights 2.0. Options will
be saved in PopTray.ini in the [KeyboardLights] section.