Copy paste chrome://settings/cookies in the Omnibox/URL bar
Or Click on:
Chrome menu
→ Settings → Advanced → Content Settings → All cookies and site data).
Search for the site & then delete.
Another method is:
Click the document icon next to the URL.
On the Permissions Tab, Click on "Show cookies and site data".
Since 2 years have passed since the last reply in this thread, I am locking it to prevent necroposting. Feel free to start a new thread or contact any forum staff if you want this to be reopened.