You can change the URL address and alternate text of the advert. Go to the Advertisement ==> Advertisement. You will see the following page:
The page has four sections. The top section contains information about plans and their prices. The following three sections contain information about banners you added. The quantity of each banner displayed is shown in the Impressions column.
To change the Redirect URL or Image alternate text, please select the appropriate item from the banner popup menu. You can open the popup menu by hovering the mouse cursor over this icon: 
. When changes are completed, select the 
icon or cancel changes, using this 
icon.
If you would like to change the banner image, please contact our support via helpdesk.