Can not delete Maneuver Node (Control Locked)
It's been a while since I've done any space travel and decided to try some old craft builds because I found the new version 1.31. is running many older craft from other versions.
While testing an old craft I came across this message when trying to delete a Maneuver Node. Can someone tell me what button I may have pressed to Control Lock this Node or how to Unlock this Maneuver Node?
Here is what it looks like on the screen