1) I downloaded it from releases, so THAT can't be the problem.
2) I installed Node, which didn't do anything.
3) I followed the instructions more carefully, and this was the result:
"Conversion complete!" is misleading, as no .wav file called "output.wav" exists on my computer, as you can see here:
In the readme, he says this:
"To generate the base code I fed ChatGPT a 1985 whitepaper by an EA Employee on the .IFF format."
Using ChatGPT as a base might have been the mistake that sealed the program's fate, as AI tends to not be very intelligent at all.