The Undo button on the route planner is only shown once you start plotting, so if you plot a new point you should then hopefully see it.
The undo button is missing or i can't see it - closed and reopend the program and still nothing
Glad you got it sorted. It must have been an unusual combination of circumstances which led to the UNDO option being mistakenly hidden. If you're able to work out how to recreate the problem let me know then we can sort out a fix.
Closed and re-opened and now it's there......
I know, but it's not there tonight!
The UNDO option should be at the top of the panel of options in the bottom right corner of the route planner map.
Making a new route but can't undo the B point.