You can try to to uninstall the software in the normal way using Windows uninstaller that you can find in Start > Control Panel > Programs. You can also visit the official support web-page for more information.
If this won't work, you can try using Revo Uninstaller. Even if it can't uninstall the application normally, it will force it to uninstall by wiping out all traces of its presence from the system.
After that, try running AdwCleaner to make sure that there are no leftover rogue registry keys or toolbars in your system.
