I have finished testing and confirm that the Access DB Migrator will work properly with v7b4.
By design, all accounts except the default Administrator and Guest accounts are fully migrated. The Administrator account will therefore need changing to suit to your requirements in the Admin section of Borg's app - Do NOT try and change the password in the database itself - It simply will not work.
I would strongly suggest executing a compact / repair on your v6 source file before you start, run the migrator and finally compact the newly populated v7 mdb before uploading.