Do you see a pink button My account in the top right corner of your screen? That means you are already signed in. Do you see the button Sign in? That means you have to log in first.
Once you are signed in click the pink button reading My account in the top right corner of the screen.
Click the black button Change/Add under the header Addresses.
Do you have more than one address listed here? In that case you can tick the box on the right to determine which address will be the billing and which address will be the shipping address. If the correct address is not listed you can add a new one or edit one of the current addresses.
To change the shipping address click the black button Change.
Change your address details and click the black button Confirm.
You have now successfully changed your address.
Attention: Please note that orders that have been placed before you have changed your address will still be sent to the old address!