If you use the Chocolatey package manager, you can install specific legacy versions like Cura 15.04.4 via command line.
Because this version is no longer supported by Ultimaker, it does not appear on the main download page. You can find the installers in the official Ultimaker archives or trusted 3D printing repositories. cura 15.04 download
Once the download is complete, run the installer and follow the installation instructions: If you use the Chocolatey package manager, you
If you are installing this on a modern Windows 10 or 11 machine: cura 15.04 download