He brought this to my attention because somehow some items are getting compared by CRC only. This is wrong on a lot of levels, but this should be a step in the right direction.
DATabaseTwo is a standalone version of what will be replacing "Import" and "Generate" and thus eliminating the need for a complex import and export process. Custom DATs can be cared by Dir2DAT features and merging so there is no use to have advanced DB features. The new database, dats..sqlite, is a much lighter version, only holding the DAT information, systems, and sources.
This is a massive overhaul that replaces System.Data.SQLite with Mono.Data.Sqlite. This should make it more compatible with Linux and Mac and has no known downsides for Windows.