Download files using cURL ("command line tool and library for transferring data with URLs").
cURL documentation here.
Create a job using the "File Download" plugin:
Default job setup
URL to download
Put in the URL of the file you wish to download.
Click "Advanced" to add curl arguments.
These are the default arguments:
-s -b /tmp/cookies -L -O -f
You can add to these arguments as necessary.
Downloaded file location
The file you download ends up in Mitto's file manager.