Archive Utility

I have been using OpenFire 3.4.1 and I was using the Archive Utility created by Stefan Reuter. It was called Open Archive 1.0.4. I noticed the OpenFire 3.5.1 has this feature built into it and the interface look extrememly similar. I want to upgrade to the new version of OpenFire but I would like to find a way to migrate the archives that I have collected with my current install. Does anyone know of a way to accomplish this?