How to save setting options of Generate Schema Script from version 10.5 onwards?
"Save All Settings to Files" option was available as a separate button on the toolbar in version before 10.5.
After selection appropriate options on the Generate Schema Script tab, in the status bar of the window on the bottom, click the camera icon.
Select Save as Action.
For more information, refer to help file on 'Automation Designer Overview' on 'To access save/load window snapshot from a Toad window'.