Some luminaire manufacturers, such as South-Eastern Electrics , maintain download mirrors for DIALux 4.13 to support their legacy plugins.
⚠️ DIALux 4.13 is by the manufacturer. It does not work properly on Windows 11/10 (especially 64-bit) and cannot use modern IES/LDT files from 2018 onward. The official free version today is DIALux evo (download from dialux.com). dialux 4.13 download free