The CorelDraw DXF export throws away the Bezier curves and turns everything into line segments. Also the version of DXF you pick for export in Corel makes a difference but still segments the result. The Import then has to try an put everythng back together.
Our DXFTool is a plug-in for CorelDraw that fixes the segmetning and exports curves and arcs. I don't know how well the Torchmate software will bring it in but SheetCAM, VCarve, BoBCAD and (reports have it that) Dynatorch's DXF imports work well with it. There is a free demo on the website.
Can't help with ProfileLab....never used it.
Tom Caudle
www.CandCNC.com