If you only need the underlying .jar files, they are available on the JasperReports Library SourceForge page . Key Features in v4.0.1
This version focuses heavily on refinement and critical bug fixes to improve the report design workflow: Enhanced Query Support: jaspersoft ireport designer 4.0.1 download
If you use the NetBeans IDE, you can find the plugin version (NBM files) on the Jaspersoft Community Knowledge Base . If you only need the underlying
While you might successfully download iReport 4.0.1 today, you are building on quicksand. The XML standard for .jrxml files has evolved. jaspersoft ireport designer 4.0.1 download