If you want to exit from Shadow Mode, you need to go to Mode Settings from the Shadow Defender interface and check Other box from Current volume status. Click Exit Shadow Mode, check Force dismount volume box and click OK. Then you can uninstall the application normally or 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.
