Remove outline from lines for laser engraving

FIrst off, I am not an illustrator user. I use CorelDraw as it was the preferred software for my laser manufacture.

Recently I had a drawing vectorized that was created in Illustrator. When I open the drawing in Corel, the lines show up as fills and not lined. When I vector engrave this, it reads the outline of the lines and passes twice. It also doesn't allow for me to edit the drawing as the lines all connected. If I break apart the lines, I am breaking the outline and not the line. I have run into this before and the creator was able to change a setting on their end and save it in such a way that I could open it as a single line.

These images show the natural view (black) and the wireframe view (red).

Thanks