For prior TinyURLs created, you can import them into your registered account by going through the following steps.
Check on the same computer and browser you created the TinyURLs with.
Please check if these links appear under My URLs list:
If they are on the list, create or sign in to your account on the same browser which will then add these links into your account.
Please note that for any other TinyURLs not on this list, we are unable to associate them to an account from our end.