I tried to use the dark library when I was investigating the cause of occasional bursts in DEC when guiding. I though have one maybe trivial problem when taking a dark.

When I used the dark option in the guiding tab for the first time I was asked to place a cap ( ASI 120MM). Now even when I delete all dark library files before this prompt does not appear any longer. It seems that the first image is treated as dark. But sometimes also random guide images in between which ends with lights being substracted from lights.

What would be the steps to "reset" the behaviour and being prompted to take a picture with a cap when there is no dark frame in the library?

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