Freecad

[A_Camera]

The post on the Freecad forum was a clue.The windows version is a bit behind the latest Linux release.I added the daily update ppa for version 0.18 and by enabling the experimental features,I quickly approximated your sloping surface and generated the toolpath that hopefully shows in the attached screenshot.

Thank you. So you mean that it works under Linux and/or 0.18 plus the experimental features enabled?

Anyway, my opinion on the 0.17 is that it is made far too complicated compared to 0.16. Simple objects are suddenly complicated to create because the "new thinking". In 0.16 I could basically do everything simply from the Part design, with the 0.17 that is not possible. So personally, I don't like the 0.17 at all.