For automated downloading you need to create a cronjob. Because most people are struggling to create cronjobs you can generate it here. Choose a download check interval and click on the 'generate cronjob' button.

every 15 minutes every 30 minutes every hour every 2 hours every 3 hours every 4 hours every 5 hours every 6 hours every 7 hours every 8 hours generate cronjob

After clicking the button you can copy the results (in bold) and paste it in crontab. If the PHP path in the result is printed in red, the system couldn't locate PHP on your system. In that case you need to open a shell command window to your server and type 'which php'. Now replace the red text with the result of this command.

RESULT:

click the 'generate cronjob' button first.

You can add this cronjob by typing 'crontab -e' as shell command. If you're not sure how to add cronjobs please search on Google (lots of info to find about this topic)