G-code generates straight line segments instead of a smooth arc

Hello,
I am trying to create a ramp, that is a nicely curved segment of a 6cm path. Yet the g-code generator provides me with a piece that is bordered with a succession of straight lines which makes the result quite unsightly. Is there any way to smoothen the borders of my piece into a nice arc ?
A g-code file of the piece is appended.
Any suggestion is greatly appreciated.
Greetings from Switzerland,
Anselm

 

Hi Peter, too bad.
Any software that you would recommend ? I don't need multilevel stuff. Just basic shapes, lines, arcs, holes.
Greetings
Anselm

 

Thank you. I will try Fusion 360.
Greetings from Geneva,
Anselm

 

Hi Peter,

Regarding our previous discussion concerning the smoothness of arcs, I opted for DXF2GCODE. It generates very elegant g-code using G2 and G3 radial interpolation. Since it is open source would it not be possible to duplicate part of it and integrate it into the Openbuilds g-code generator ?

Greetings from Switzerland

Anselm

A sample is appended