Notes about the 3DX file extension:
Incorrect file associations could be the result of underlying issues within your PC system. As such it is highly recommended to scan your PC for invalid registry entries
, unused processes and other unfavourable system settings to identify slowdown issues.
The 3DX file type is primarily associated with 'Rhino 3D' by Robert McNeel & Associates. Rhino3D is a NURBS-based modeler for Windows. An alternate extension to .3DM; you can rename this file to .3DM and Rhino will open it.