I now understand. My confusion arose because the behaviour of the Load Game dialog was not what I expected. The initial dialog shows ONLY the latest save for a specific game and it never occurred to me that the Restore button would launch another dialog to actually select an archive to be restored. The manual, to me at least, does not make this clear.
Assuming that the framework you're using supports it, may I suggest that you follow the standard Windows and Mac convention of putting three dots/periods after the word Restore on the button to indicate that the Restore button is not an immediate action button but one which displays another dialog. This alone would have eliminated my misunderstanding.
P.S. I've been getting "not delivered" on email I've sent you recently, including for older emails that I know you received (advanced game corruption due to a spotting error) since you replied to the email and fixed the bug.