You can manage all application links through the Invite tab in your assessment setup menu.
Click on your assessments three-dot menu, then select "Invite Candidates". Scroll down to the bottom of the page, and you will see all the options to create trackable links or manage links that you have already created.
You will be able to create new links and edit, delete or copy the links from here.
For complete information on creating assessment links, read here.