It's a community driver:
I just did an experiment. Nothing to do with direct association, just a simple rule. I noticed that with the included HE driver, only two buttons are available: tap up once=1 and down=2.
With @JasonJoel 's driver, six buttons are available, with double tap up=3, and so on.
I also noticed that the light I was controlling came on faster with buttons 3-6 compared with 1-2. Not sure exactly why.
So, with toggling, you could conceivably control 12 devices, if you could keep count of the taps, lol.
Here is a screenshot of @JasonJoel 's driver page on the experiment I set up.:
