Years ago I got some free program from PTC. Even though I had a mid-range OpenGL graphics card and a supported OS, it wouldn't work at all. A year later there was an update, which did run, but the invisible PTC cursor on the screen was a few inches to the left of the mouse pointer making menus and item selection difficult at best. Perhaps this is just a newer version, much improved.
If you have time and interest, give Blender a shot. It's not parametric and there's no drawings to be made (Draftsight is a free AutoCAD knock-off from an Autodesk competitor, if you want to make some drawings) but Blender is a most amazing piece of work and amazing results have come from it.