I'm working with a pattern that is converted from an STL file. Can I change the shape of a part of that pattern? (the outline carve) I can't seem to find something on the tool bar that will let me make changes to the basic shape. I can mark the shape I want, but I can't change the outline to the new shape.

And I was going to add a copy of the file here, but it won't load. Is there a way to make this sort of change? Maybe before its converted to MPC?