Official releases are made when the project seems stable and has reached the end of a development target.
Development files are usually stable enough to function due to the updates being made in batches and being pre-tested prior to committing to source. However complete areas may not function depending on whats being worked on and the stage of completion that has been reached.
You can browse the development sources and download them as a compressed file. If you intend to download a copy, unless you want everything, its recommended to browse to the version you are after and use the download link from there
or use an SVN client to browse and Checkout the files. Commits are not permitted. The SVN URL is
svn co https://jdbwc.svn.sourceforge.net/svnroot/jdbwc/DriverBundle/JDBWC_1.x.x/ jdbwc