Thanks for responding so quickly, Tihomir. I checked everything in your reply, and everything is in order. The only other thing I can think of, is something that doesn't matter: the PC I'm running it on is actually a VM. This really shouldn't have any effect at all: as far as it knows, it's really a hardware box running Windows Server 2003.
Anyway, I get no errors in the console window; it just doesn't show the DSP nodes. My Package Explorer looks just like yours in the video, with the Exception of being on Windows vs. a Mac. No idea...