Thank u Glenn for the quick reply. I have the images saved here:
/public_html/includes/templates/avonlee_contempo/buttons/english/boxhead-categories.gif

The Better Categories must have already been installed on the template, I haven't installed any modules.
When I log into the admin, go to modules, the Images for Titles is not showing, even though I've uploaded it through FTP several times.
I haven't tried uploading any other images, I suppose I could try that too.