This application is a very simple wallpaper changer It requires only java runtime environment (JRE) and gconftool-2.
With this application you can easily change your gnome desktop background at every time interval!
If you want Wchange starting at startup then just select "Add to startup" checkbox.
How to uninstall it:
just delete exec.sh and Wchange.class from your installation folder.
If you chose to add it to your startup programs just delete it form your "session preferences".