as @Sharon, I had a problem with StaMPS export with Preview 5.
In particular, it is impossible to export the elaboration because appears the message “org.esa.snap.core.gpf.OperatorException”.
I realized that the export starts, but the process stops when Snap create the “/dem” folder.
This is a big problem, because without “/dem” it is impossible starts time series analysis with StaMPS.
This issue did not appears with Preview 4.
PS: with regard to my problems with tile evenly, they are solved with Preview 5.