@Gog- I have found that Arbaro tends to "hang" when exporting complex models in .obj format. The .dxf export seems to go a lot faster and since neither of those formats exports with materials, unlike the "native" POV, it doesn't really matter. Normally I would choose .obj export in any other app 'cause it handles UV's and .dxf doesn't. Luckily the leaves and trunk export as separate parts.