The followings are the links to the upload files:
RAW
www.dropbox.com/s/vtl4jgte36rwulw/D81_2216.NEF?dl=0

Debayered fit
www.dropbox.com/s/lo40v6hqj06q286/D81_2216_d.fit?dl=0

BTW, I tried to find a work-around and noticed that reducing the size in the capture module to, say, 3000 x 2000, avoids the crash and the FITs viewer shows the downloaded image. As long as I select the Card as the capture destination in the INDI control panel, full-sized images are kept on the card, so I can finish a sequence without the crash of Ekos.
Since a fit file sent from my D5300 with the full resolution (6016 x 4016) does not cause any crash, at least this size of fits will be downloaded to the FITs viewer on Windows.

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