Hi GraddySK,
Thanks a lot for using our theme and your kind feedback!
The upload through the theme customizer or on WP-Admin > Appearance > Header should work fine (see screenshot).
The same goes for the background color (that you mentioned in your review). You can change it through the customizer or in the back end in the appearance menu.
Are you still having issues?
Best regards,
Simon [wpCasa]
