: Users have reported performance lag with version 6.6.0 in some environments. Increasing the RAM allocation in the Jaspersoft Studio.ini file (e.g., -Xms2048m -Xmx4096m ) may resolve UI "blinking" or freezing issues. Jaspersoft Community for connecting a specific database like to this version? TIBCOSoftware/jaspersoft-studio-ce 6.6.0_ce on GitHub