Would be nice to be able to set the Line/Arc type in preferences in order to save it. I like a lot the possibility to choose Line or Arc, but it does not stick between sessions. The same I’d like to see in a future Circle Radius/Diameter setting 
Great work 
Edit: Sorry, the setting DOES stick between sessions. Or I was daydreaming or it is this 3.36.1 version that just did it…