Thanks, Kirk - I know you have your hands (and feet) full, with the release.
FWIW, the workaround (for anyone else that's seeing this), I have all my droplets in a single folder of course. Open the folder, select all the thumbs in PM that you need to run the droplet on, and drag those onto the droplet icon.
Not quite as elegant as doing all this inside PM, but if you have files selected by color etc. this is much easier than trying to do this directly via PS etc.