Open it. Re-arrange in the XX-Y plane. You can select multiple items in blender and export them together. Use the b key to trace a bounding box to add several items to a selection. Press, r, z, 90 to rotate 90 degrees, for example. Create your own combined builds to save setup time.
Corell Draw file:
It contains a squished froglet of which I couldn't find the lasercut files, so I made one myself by manually tracing an export of the STL file. It worked well for me. It's not perfect but works well for me. I've also made it a bit lighter by removing some rectangles of material.