Hi, the itch has page about this kind of problem - https://itch.io/docs/buying/already-bought , hope it will help.
Viewing post in Horror Music Pack - Vol III comments
Appreciate the response, and I did double-check the post you linked. However, the issue is that when I go to the download page for this album, there's nothing to actually download. The area where the button should be has the message, "Nothing is available for download yet." The direct link itch.io sent me via e-mail goes to this same page.