I'm new to GIMP, and I'm trying to use the intelligent scissors.
Is there a way I could delete a point once I clicked it ?.
You can move the points, so by moving one onto one of its neighbours
will have the same effect as deleting it.
I think you should try using the bezier selection tool instead. There,
you have move freedom to move, add or delete points.
Gimp-user mailing list