Add a button "Detach selected" under Wordpress Toolkit
and show the full URL, because now we have to detach one by one our Wordpress installations. Also for installation that were altered or deleted outside Plesk (via FTP), the path is not shown anymore
Actually, we have added the ability to mass detach instances in WPT 3.4. Refer to the following forum thread for more info: https://talk.plesk.com/threads/wordpress-toolkit.343831/page-6#post-852908. Hope this helps.
Marco Marsala commented
It will be useful if you migrated a Wordpress installation from test folder to production / to remove the old reference from Plesk (Dertach) and get the new one (Scan)