Go to File > New > Jasper Report and select a template like Blank A4 .
To download Jaspersoft Studio 6.6.0, you can use the official SourceForge repository or the Jaspersoft Community archive. Note that version 6.6.0 is an older release and was known to have specific bugs, particularly regarding barcode generation. Download Links download jaspersoft studio 660 fix
Before downloading, you must know that Jaspersoft Studio 6.6.0 contains (specifically related to the Log4Shell exploit). Go to File > New > Jasper Report