v5.1.1.790 [Dec 24, 2008]
Revolutionary new user interface, the source format in this version is XML, WYSIWYG XML editing, Multi-user support, skin support, capable in handling big projects, work-flow integration for 3rd party tools, and more.
v4.51 [Feb 13, 2008]
XML Export and Import
Convert PDF files to HTML pages in batch mode, supports command line interface.
Macrobject Help Authoring Suite (MOHAS) is a suite of help authoring tools.