Please read the previous support message:
http://www.cameraftp.com/bbs/getmsg.aspx/bbsID1100/msg_id54842890/ref_id54275044
To delete all images, you can delete the camera online after you logon as your Camera Admin.
You can also batch delete files using any FTP client software such as FileZilla. You must log on with your username and secure password. Your secure password is set to be the same as your password. To delete files using FTP client, you must change your secure password online so that it is not the same as your regular password.