Huh, theres a 6.3.0? :D Okay, done, the Compatibility Configuration looks different here, but the Compiler-download still doesn't work from URL (http://sourceforge.net/projects/jasperreports/files/jasperreports/JasperReports%203.7.4/jasperreports-3.7.4-project.zip/download). SF states a "!not found" error, but with a different URL (https://sourceforge.net/projects/jasperreports/files/archive/jasperreports/JasperReports%203.7.4/jasperreports-3.7.4-project.zip/download) it still says "There is no JRCompiler" But there is now an option to "Add From Path", which works with the downloaded jasperreports-3.7.4-project.zip. Just extract to any folder and add it. This works for me now.