I finally got a chance to play with the Fabber plugin. The plugin loaded fine and seemed to work properly from inside SketchUp. I tried to export the Fabber Sign. Attached is the SVG.
When I open it in Affinity Designer, the perimeter looks right, but only 2 letters show and they are not complete .
The other letters are there but color coded for exterior cuts. When I loaded the svg into Origin it actually looked more complete. I aircut the perimeter and that work fine. I could also aircut the F, which shows as a pocket cut, which I did first, followed by an inside cut. The A, had a little problem in that if I cut it as the designated pocket cut, the pocket extends into there in the middle of the lower half of the A, which should not be cut at all. I could get it to work by changing the cut type to inside and the outside the area at the bottom of the A. The same held true for the B.