Bug / Crash Control Points are not shown anymore

[josemendez]

This is a known issue with Unity's window layout. Reset the editor to the default layout and the button will reappear. See our FAQ:
http://obi.virtualmethodstudio.com/faq.html

I can't see the path editor when clicking the Edit Path button in the rope inspector. Is this a bug?

The rope inspector is a sceneview window, and Unity won't draw sceneview windows if any inspector is in debug mode. Close all inspectors in debug mode (easiest, quickest way is to revert the window layout to the default) and it will become visible again.