Change Banners
Most of your banners are located in the following direction. Go to your Admin Dashboard, then click on Journal - Modules - Banners, and there click on the wished banner area that you wish to change.
Once you click on the wished banner area you will be able to select the banner on the left side under the General tab and change it according to your needs. When you change the picture do not forget to click on the Green Check Save button at the top in order to save it.
Also, make sure to clear the cache from your store once you change the banner. Go to System>Tools>NitroPack> Click on Clear Cache on the top right and from the drop-down click on "Clear All Cache" and you will be able to see them loaded on your front.