Nothing wrong with Inkscape.
- Open file, accept default import settings.
- Click on design, Ungroup, Ungroup.
- Click on any black area, then right-click and “Select same -> stroke color”.
- Select “Edit -> Make A Bitmap Copy”
- Select “Edit -> Cut”
- Repeat step 3, then hit delete, followed by “Edit -> Paste”
If necessary, align the center of the engrave sections with the cut circles in the middle of each tile. Don’t forget to save!