: DIALux 4 was designed for older versions of Windows. While it may run on Windows 10/11, it is considered technically outdated and does not support modern BIM workflows.

Final practical note If your goal is to open and edit existing Dialux 4 projects or to use a specific toolset you already know, Dialux 4.13.0.2 can still be useful — but treat it as legacy software: validate download sources, isolate installation if necessary, and plan to migrate to a current toolchain for long-term workflows.

By default, the website will push you toward the newest version (DIALux evo). You must look for the legacy section.