This is a minor release to be used with version 4.2.x (or higher) of the 3DCityDB and version 5.5.x of the Importer/Exporter. It cannot be used with previous versions of the 3DCityDB and Importer/Exporter anymore. Note that Java 11 is now the minimum required version for using the i-UR ADE extension.
See the change log for details.