It seems my QB64 is no longer capable of downloading any Help files on its own. Using your files, when I press [F1] on my foo~& it says it is downloading the page for LONG, but it never succeeds. My QB64 used to download pages, though it has always taken 30+ seconds per page. I don't see why Windows would suddenly start applying a firewall rule to the app after it was working for months. I will check to see if there's anything blocking it, but I don't think there is. It did create an empty .bin file when I told it to update, so it's not a file permissions issue. It looks like an issue with the QB64 IDE itself, possibly due to being in an inconsistent state after I killed using the Task Manager while it was too-slowly downloading every Help page.
How long does it take you to download a Help page -- nearly instant, or 10-40 seconds?