Version 4.0.1 can still be found in archive repositories, primarily for maintaining older legacy systems.
Released over a decade ago, iReport 4.0.1 hit a sweet spot for stability. It was the version just before major architectural shifts that broke compatibility with older Java environments. Many developers stick with 4.0.1 because: jaspersoft ireport designer 4.0.1 download
🔗 https://sourceforge.net/projects/jasperreports/files/ireport/ Version 4