If you click on 'Copy my Credentials' in Kno2 under the API Settings but are unable to paste the credentials into Notepad or another text file:
Copy & paste could be 'Disabled' in the browser
Utilize these links to re-enable copy and paste: https://help.yahoo.com/kb/SLN21638.html or http://digiwonk.wonderhowto.com/how-to/re-enable-copy-paste-annoying-sites-block-0155910/
Settings may need to be modified to be able to copy and paste