Noted someone had an issue where they lost the whole file during a save and yes it would be good if it backed up first.
However I used an old lightburn clb from a previous Emblaser. Using Notepad++ I realised it was XML so I did a find and replace on all the max power to drop to 80 instead of 100 and also changed all the locked materials so I can edit the whole library.
Thought it was worth sharing.
My suggestion is for a node cut so I can change a cut to part of a circle that needs just a line rather than going back to the drawing program and segmenting it.