I could not get any AI files to work with any program (any except Adobes). It is always an empty page.
I have tried to use RDworks, Inkscape and other programs to convert the svg files from Lightburn but with mixed results.
PDFExpert (app) could read the svg files and export (print) them but with a wrong dpi setting (printer dpi?). The objects have a different size.
Svg files from Lightburn imported with Inkscape and exported as different svg files does not work either. Sometimes objects are missing. And sometimes the lines had different thicknesses. There does that come from?
Missing objects sometimes reappear in Affinity Designer if they are changed in Inkscape but not always. Complicated objects with several layers are a pain with Inkscape.
Inkscape’s Eps or PDF export does work perfectly to import into Affinity Designer (and Photo).
A PDF export in Lightburn would be great. There seems to be something „portable“ in Adobes portable document files.