Hello,
Reporting similar issues. I am able to reproduce a crash pretty consistently by pressing middle-mouse click to switch from 4-up viewer windows to 1-up view windows. Tried deleting the prefs folder, but no luck. I do still have plugins installed, and HB Modeling tools, but not sure if they are the cause of this? Specs below.
Operating System and version: Windows 10 / 10.0.1836 Build 18363
GPU and CPU Make and model: Nvidia 1080ti x2 / Intel i7-6850K @ 3.6GHz
Cinema4D version: R23
What were you doing at time of crash: Middle click. I can consistently crash C4D by middle-mouse clicking to switch from 4-up viewer window, to 1 viewer window.