Why do I need it to test the software and why it does not let me uninstall it through the Control Panel? What should I do to uninstall it?
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.