How To Uninstall Ubuntu Wubi?

I tried to follow the guide as mentioned in :

How do I uninstall Ubuntu Wubi?

But Unfortunately,
I cannot find the Ubuntu Entry in my add remove programs, and I find the guide quite confusing for manual uninstall.

Please guide.

My OS is Windows 7 in C:
Ubuntu 13.04 is Installed in D:

using Wubi Installer.

Regards