Automatic reopening of unwanted XDP6 files.

In Designer Pro 6 Under Options, Backups, there's a check box that says, "Backup open documents on program close and restore on program start." Sometimes I want some of my open documents to reopen on program start (I think this is great!) But my problem is even when I first close those documents (that I don't want to open on program restart) before closing XDP6, when I reopen XDP6 the ones that I closed reopen. What can be done to change this behavior if I want to keep the box checked?

Thanks in advance for any suggestions.

not sure

how do you close the files because it may have something to do with which way you choose, there being three options: file>close, ctrl+w, x [on window top right]

I have it switched off - but it seemed to work ok when I tried it just now