Thumbs up app icon change

Hi all,

I am not very android friendly..
I have recently purchased an app and want the icon and app name changed within the package.
I have asked the developer and he said its too much effort as it would need to be re published etc..
can anyone do this for me ?
i have had a look through eclipse but cannot figure it out.

any help more than appreciated as i have been banging my head for a week now.