Importing Alerton Database

My Alerton system has the ability to export trends to both csv and access database. Using the understanding that UT3 can accept database imports when I run an Alerton folder import and select my folder containing mdb files (one per trend) the UT3 returns two errors:

Error: Format not supported (one for each trend), and

Error: Invalid call. This is a file based data adapter. Instead call CreateDataSource(System.IO.FileInfo)

Should I abandon a database import in favour of csv? Or is there a change in my approach needed?