I have accidentally changed the taskbar (bottom one with start/menu) background image. Please help me to restore it. I tried some paths but couldn't find the file. Then I tried to remove debian and reinstall. First opened close debian. Then rm -f debian image. Then removed chroot n all in case it's necessary. Also deleted some files existed in /home/user/

But still after reinstalling debian I can't see any change. I don't get a restored desktop. Please tell me how to reinstall debian so that everything will be default as first try.