TpX: drawing tool for TeX

Thanks for this answer.
I tried to convert it into both formats using DWGTools Converter Command Line v2.0 but SVG returns "Bad XML. Mismatched tag end: SVG" when loading to TpX and EMF conversion loses filled areas and line thickness (all lines are converted to thick = 1px). I think I will stick to my old solution, at least until/if I release a totally new version of my program.