To uninstall the NordLocker application navigate to your Applications folder using Finder and locate the NordLocker application. Drag and drop the application icon into the Trash (at the end of the Dock) or tap with two fingers on the icon and choose the Move to Trash option in the pop-up menu.
Please note that the application will be permanently removed from your Mac the next time you or the Finder empties the Trash. If you decide you want to keep the app, get it back before emptying the Trash - select NordLocker in the Trash - File - Put Back.
Then download and install NordLocker here.