That plugin is not posted on my website. I only provide the Homeseer plugins in executable form, along with a sample pronto snippet on how to write the pronto code to interface with the plugin. The plugin allows you to control all lighting with full status (on/off) returned. someday I will add brightness feedback, although the plugin handles it, the Pronto code does not. It also allows you to run any script or function on Homeseer. I use that to control HVAC, get stock quotes, weather forecasts, control the security system etc.
If you want a copy drop me a line at [email protected]