Hi Matthias,
fortunately, I had some time to play around with Python and wrote code to implement the ARC ruler in KLayout. The usage is pretty easy: Choose ARC Ruler from menu, click three points on the arc and get a circle style ruler with center …
Your answer is coming very fast. Nice to see, that the tool is maintained so well!
The crash happens, when I am editing ruler properties with the properties dialog on an existing ruler. For example, during the typing of a value in a field. It does …