Keeps crashing

From Preferences I would select "Use Large Icons" and then "Use Dark Theme" in either order and the app crashes hard. I love the concept and the app is exactly what I needed so I really like it and would like to use it and go to the pro version after a reasonable trial period. In its current state it is unstable on my Mac. Note I reffered to "My Mac". Could be something here too.

Dad* about IP Scanner