Can I change the graphics provided by Triond?

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I recently submitted two stories in Authspot section of Triond and noted the small thumbnail graphics they used to illustrate my title. The gnomes they chose were rather silly looking. It is obvious they are somewhat limited with graphics. Check this out to see what I mean.... http://www.authspot.com/writers/Leafygreens.59457 Has anyone been able to change such images? Thanks!