Hi Heinz:
Very good choice to only use WCS to make config changes!
I'm not sure I follow what "download" you're referring to.
About the only auto-save is "Save before Backup" on Configure > Controllers > choose a controller by its hotlink > Properties > Settings. This will cover both scheduled controller config backups and those executed via "Run Now".
Sincerely,
Rollin Kibbe
Network Management Systems Team