Hi! We actually don't control the links directly - we just provide the files to Itch.
"javascript (void)" is actually a browser term that means the link basically functions as a button. If you're trying to control-click on the link, that's probably why it doesn't work. "javascript (void)" links generally only work when clicked normally.
Alternatively, you may have something blocking popups, like anti-malware or a browser extension.
Hope that helps!