Among other things, this version reintroduces Merge support.  Also, the importer code has been completely rewritten to help improve accuracy and increase import speed.  Because of this, it is highly recommended that existing users uninstall any previous version and install this latestest version clean (you will not lose any of your settings or saved filters).  Also, while this version does include an update utility, it is highly recommended that you move all of your hand histories from the archive directories back into your import directories, create a new database, and reimport your hands. Reimporting your hands is much quicker and it is less likely that you'll run into problems compared to running the update utility.