![](https://s3.amazonaws.com/cdn.freshdesk.com/data/helpdesk/attachments/production/69117775140/original/YdripWKqP0ee02khnbTFOc6rAuiHyV4w4Q.jpeg?1718227320)
Legacy Engine databases are now incompatible as of Engine version 4.0 and higher. These databases are used in Engine DJ and Engine OS versions up to 1.6.1.
To update a legacy Engine Library to use with version 4.0.0, follow the steps below:
- Download and install Engine DJ 3.4.0.
- Launch Engine DJ 3.4.0 and connect any drives containing a Legacy Engine Database.
- Migration of databases should occur automatically.
In some instances, a new (blank) database may have been created. If the steps above did not work please try the following:
- Make sure Engine DJ is closed
- Navigate to the drive that contains your Engine Library folder
- Delete the "Database2" folder
- Open Engine DJ 3.4.0
For further assistance, please open a support ticket.