Thank you for sharing!
Interesting: The only difference between your and my settings is the flag "Use Scale" in the third screen. In my options, this flag is set. If I clear the flag, Kstars chrashes to desktop everytime when I load my fits-file. If I set the flag, it does not crash, but solves for ever...

I uploaded this fits-file to dropbox, I hope this link works:

www.dropbox.com/s/mpjpkqka3aqyf3b/Light_006.fits?dl=0

Maybe you want to try if you can solve that image by using "Load & Slew".

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