Append an attachment to current lesson
1) You need to upload attachments to server before appending them to a lesson.
(from the main menu, select Options, and then click on Upload files. See Upload Files under Options submenu )
2) you must have this screen visible on your monitor
3) Click on Attach Files button
4) If you see this screen, then you have not uploaded your files to the server.
Click on Options submenu and upload files (attchments)