Fachwerk3D calculates three-dimensional strut-and-tie models used by structural engineers for analysing and designing reinforced concrete structures. The program only uses the equilibrium conditions, thus it is not assuming elastic behaviour. Changes: This release improves the automatic model reduction algorithm. Linux users will benefit from desktop integration. The user manual has been enhanced and updated. It now covers the automatic model reduction introduced in the 0.4.x release. While the examples are two-dimensional, the feature also works in 3D.