At all times you have a default script style. This is the last standard style you either loaded or saved. The default style is never a program style, it can only be a standard style. This is because a standard style is guaranteed to exist.
When you create a new script using the toolbar, it will create it using the default script style. You can change this after you have already created the script by loading the style you want.
When you read in a RTF file, it will set the script type to the default style. You can change this in the RTF read dialog box.
