I am not experiencing the crash on my machine with my settings and that file, e.g. see
You can work around this by manually editing your settings file.
I'm not sure where that is on a mac, but perhaps you can figure it out from its Linux location: ~/.config/kstarsrc.
If you remove the corresponding line on your system, then your terrain overlay shouldn't be loaded next time you start KStars.
(Note: most settings are not saved in users.sqlite.)
If you send me that settings file, that would have the info related to the screenshot I asked for,
also, though, it shouldn't crash anymore and you should be able to take a screenshot.
Another thing to experiment with in the projection you're using (View --> Projection) although I tried all and couldn't reproduce the crash.