Because Thunderstore really doesn't want to leave the file as it should be, I'm going to tell you how to fix it.

In the same folder that this text file is in, create a folder called "CustomSounds" and a folder called "Heat Delivery"

Drag and drop all of the audio files into the "Heat Delivery" folder, then drag that folder into the "CustomSounds" folder.

Hopefully this problem resolves itself when I reupload this but just in case it doesn't you at least know how to fix it now.