You're looking to download Jaspersoft Studio 6.6.0. Here are the steps:
Jaspersoft Studio 6.6.0 introduced several enhancements designed to streamline report development: Request for Jaspersoft Studio v6.6.0 - Products
JasperReports Library: While the Studio application is harder to find, the corresponding JasperReports Library 6.6.0 JAR files are still archived on SourceForge . Recommended Action download jaspersoft studio 6.6.0
Conclusion
Downloading Jaspersoft Studio 6.6.0 requires a specific process because this version is considered "Legacy" software. TIBCO (the owner of JasperSoft) has moved newer versions behind an enterprise login wall, but older versions like 6.6.0 are often still available via their public archives or historical community links. You're looking to download Jaspersoft Studio 6
Click the download icon. (Note: SourceForge may attempt to show you mirror ads—look for the "Problems downloading?" or direct file link).
If you want, I can provide direct download links for your OS (Windows/macOS/Linux) and the relevant checksums — tell me which OS you use. TIBCO (the owner of JasperSoft) has moved newer
Ready to download Jaspersoft Studio 6.6.0?
Start with the official TIBCO Community Archive. Ensure you have JDK 8 ready, and you’ll be designing JRXML reports within minutes.