## Updating from BinNavi 3.X

The database support for MySQL was dropped starting with BinNavi 4.0 due to licensing issues with Oracle. The MySQL database backend has been replaced with a PostgreSQL backend.

## Updating BinNavi 4.X

For all versions within 4.X BinNavi supports automatic updating of existing databases.

## Updating BinNavi 4.X to 5.X

An update script is provided for updates from the 4.0.6/7 Database layout to the 5.0.0 database layout. Be advised that there have been substantial changes to the database layout, please backup your data before proceeding with the update.