In Summary:

To update your shop you need to use the Update tab on the Editor for each ShopBuilder section. If you've not done this before it's very straightforward.

1. Go to your shop page whilst logged in
2. Click the shop on the page so it's highlighted
3. Next, go to the Editor and click on the Update tab
4. Then click on the Update widget button
5. Save your page (Save icon on toolbar)

You'll need to do this for each of the four sections (Product Catalog, Product Detail, Shopping Cart and Sale Confirmation) which you can work through using the drop down on the toolbar.

1. Select the next section and repeat steps 2 > 5
2. Once you've done this for all four sections you shop is now fully up to date