DXFTool Standard Edition For X4

The DXFTool Standard Edition works on the bezier curves internally, there is NEVER any need to convert your drawing to curves, not even for text!

This means that you can quickly make changes and export a new DXF file. You don't even have to save your drawing before exporting.
The main screen of the DXFTool Standard Edition shows the different options that are available.
The 'Quick Start' section gives a simple workflow that will get you going ASAP.