by Jim » Tue Jun 21, 2011 4:14 pm
Go to Preferences > Themes and select a theme, save changes. On the next screen say "yes" to replacing the layout on your pages. That will replace all of the templates for pages, products, shopping cart, etc and give them a "default" look. There is really no default look though because the original theme was selected by whoever went through the start up wizard when the store was initially installed.
If you want to change text on various screens back to the default you can do some of that by going to Preferences > Store Text and then on each of the subsequent screens under there click the Reset to Default button at the bottom of the screen. There may be other values that they have set that you would need to manually edit to get them to what you want.