Great word, flummoxed. We are very sorry this is happening to you. For some reason your title thinks it has an attachment associated with it. I wonder how the title did get into this state, did you happen to add a BranchTrack interaction or any attachments?
Was the title originally a Lectora Desktop title you imported?
You might try exporting the title to a PKG file and then import it back to see if that fixes it.
Another option is to create a new title, then with both titles open, copy all the objects in the title explorer and then paste them in the new title.
I see you are on a trial but you can still send this to support if none of the options work for you. I will also report this to the team and see what we can do.