Right-click on the place where that image should be and select "properties". That will show you what folder it is looking in, and what image it is looking for.
Go to your AdminCP and find Themes. Select the Blue Lust theme and scroll down to where it asks where your images are. Change that to point to the theme's images.
You will most likely find the theme's images all in one folder.
That is also the place to add the URL for your logo.
Go to your AdminCP and find Themes. Select the Blue Lust theme and scroll down to where it asks where your images are. Change that to point to the theme's images.
You will most likely find the theme's images all in one folder.
That is also the place to add the URL for your logo.