Please note that SQL Workbench/J has no relation to the product MySQL Workbench which is maintained and owned by Oracle.
If you are looking for MySQL Workbench support please contact Oracle.
A development build is generated while testing and implementing new features for the next stable build.
Bugfixes will show up in these builds first.
Please delete all existing files from the ext sub-directory before extracting the new archive, to make sure that only correct and up-to-date libraries are used.
(Currently there is no development build available)