I know it's possible to auto-calibrate the light frames with the calibrationsets in Maxim DL.

What I would like to do is shoot the flat frames at dusk and use these for the following light frames that night. I can save the flat frames to a custom folder, so Maxim can use them. But if I do this every night, how can I make sure only the latest flat frames are used and not the old ones from previous sessions?

Nice to know: it will be a autonomous remote setup accessible via the webinterface of ACP.