I don't agree with that. For various reasons I had to start again with another clean ZenCart installation on another server, and had exactly the same problem again - nothing showed up in the shipping modules.
This time I was ready for it, copied the files into the correct locations, and it worked perfectly.
In the download, the files are located in
catalog\includes\templates\template_default\images\icons\image files
catalog\includes\languages\english\modules\shipping\austpost.php
catalog\includes\modules\shipping\auspost.php
whereas on the server they're basically all in the same directories MINUS the directory of catalog.
When I installed it this time there wasn't even a directory called catalog in ZenCart - I copied it across. And of course nothing worked, because ZenCart didn't recognise that directory as having anything to with shipping.
In INSTALL.TXT the instructions say quite specifically "Unzip and copy the files into their default destinations (ie, same file structure as the zip archive)."
The files under the admin directory work just fine, so there's no reason to look at the catalog directory and think oh, that's obviously wrong, all that stuff should just go in the includes directory.
Further down in the instructions it talks about files such as /includes/templates/template_default/images/icons/austpost.jpg which is a tipoff that there's no such directory as catalog required.
All that's required is to take out the directory level of "catalog" in the download file and start it at the "includes" level.




