Thank you for taking an interest in learning. I really am glad to see that.
All I did was open the DXF file in libre-cad (open source program) and then export as maker-cam SVG to local drive, then open with Inkscape (open source program) and select the unwanted lines as nodes and delete. then selected shapes (they were grouped) and ungroup so that I could edit them individually. I then selected each shape with the node edit tool and selected all node and then connected all nodes that were touching. done.
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