I've downloaded the latest dev build 127.7 (+ additional libs).
When I launch a script which exports the query result in xlsx, I get this error message:
"Excel 2007 files are not supported because the OOXML libraries for POI are not available.
Make sure the following files from the POI distribution are present in the "ext" sub-directory where sqlworkbench.jar is located."
...even if the POI libs are present in the ext folder.
The same script works as usual with 127 stable release and previous dev build 127.6