You can use the command line to download files from CloudStor:

curl --user "[email protected]" https://cloudstor.aarnet.edu.au/plus/remote.php/webdav/filename.txt

You can supply a password like so:

curl --user "[email protected]:password" https://cloudstor.aarnet.edu.au/plus/remote.php/webdav/filename.txt

See use AARNET CloudStor via curl