The application won't open (Java Error). Solution: Jaspersoft Studio 6.6.0 is built on Eclipse 4.8 (Photon).
Avoid third-party “cracked” or “pre-patched” versions from random file upload sites (uploaded.net, mediafire, etc.). These often contain malware. The “fix” is a configuration, not a binary patch. download jaspersoft studio 660 fix
If you are looking for a specific binary patch (hotfix), select the specific sub-version (e.g., 6.6.2) rather than the initial release (6.6.0), as these contain the accumulated fixes. The application won't open (Java Error)