In a nutshell, this tool migrates archive files from the LiveCycle ES to LiveCycle ES2 or LiveCycle ES2.5 applications. Without this tool, it is necessary for you to manually upgrade your LiveCycle ES applications. For more information about upgrading legacy soutions, see Upgrading legacy solutions to LiveCycle ES2.5 in the LiveCycle Workbench 9.5 Help.
Enjoy and please do not hesitate to provide feedback!
Original article at http://blogs.adobe.com/livecycledocs/2010/11/archive-migration-tool-available-on-adobe-labs.html.