Maybe I’m missing something here, but here are the symptoms.
Using 3.8 beta – all the features worked in the DB browser – including the feature to generate Hibernate classes and xml files.
Using 3.8 GA – the behavior of this feature changed – in that the application no longer exported java classes using the Hibernate feature.
Using 3.81 – the Hibernate feature now works EXCEPT – existing functionality “Generate Select in SQL editor” returns an empty sql editor.
“Create Table Script” is also no longer working.
Apologies if this bug has already been written up.