When you first click on the Design option in the drop down menu you will be asked whether you want to change your theme or not. If you wish to change your theme then follow the steps below. If you clicked on the Design option because you wanted to change your Theme Options then you will need to follow our other tutorials here.
1) First move your mouse over to the drop down menu, on the top bar, in the top left corner of your site and click on Design.
2) To change your theme you will need to select the one that you want to use, by clicking on the button to ‘Install’ the theme, from the list on the right-hand side. Then confirm your changes By clicking ‘Confirm’ at the bottom of the page.