Try to locate the folder for the application.
Sometime it required to uninstall from the application in the C:\Programs Files
If the application folder is empty, then it had uninstalled.
Not all application can be uninstall from Control Panel.
It may require you to reboot the computer to clear any leftover data inside the folder.
One other method is to Install the application, read on how to uninstall during installation, if any.
Reboot
Do the uninstall in the application in program files folder.
Reboot.
Sometimes it need to re-install and then uninstall, for some application.
Reboot is to clear any leftover in the memory.