WebPlus X6: Getting rid of table background image

For some reason an image has emebedded itself into one of the tables in a page I'm creating, and because I can't edit the HTML I have no idea how to get rid of it. How can I delete the background image from the table, please?

I'm not very experienced with this software, so please be gentle with me. :)

Attached Images

2013.01.13_WebPlus X6 - -Site1 - Source-.jpg (218.5 KB)