Before downloading and installing Jaspersoft iReport Designer 4.0.1, ensure that your system meets the following requirements:
The most trusted repository for all legacy Jaspersoft iReport versions is SourceForge. Jaspersoft officially used SourceForge as a mirror during the 4.x era.
: TIBCO historically hosted these on SourceForge, though many current community links now redirect to the modern Jaspersoft Community Download page which features Jaspersoft Studio. NetBeans Plugin
Legacy Report Design Tools: A Case Study of JasperSoft iReport Designer 4.0.1 — Availability, Use Cases, and Migration Considerations