The Best Way to Download Jaspersoft iReport Designer 5.1.0
Configure ireport.conf: If the application closes immediately upon opening, you likely need to point it to a specific JDK path. Locate ireport.conf in the etc/ folder and set the jdkhome variable (e.g., jdkhome="C:\Program Files\Java\jdk1.7.0_xx"). Key Features
Configure Java Path: If iReport fails to open, navigate to the installation folder and open etc/ireport.conf in a text editor.
iReport 5.1.0 is notorious for not working with modern Java versions (Java 8 or higher). The Fix: You must have Java 7 (JDK 1.7) installed.