In this release, only the web application (server) component was changed.
Changes
The v2.0.0 server will now automatically display all of the complete track sets. A track set is considered complete when at least one user has driven all tracks of the track set and uploaded/submitted his records.
In the first release you had to manually change the server code to display new trackSets (e.g. each time when a new season started and you wanted to display it on the webpage). Now, this is not necessary anymore.
Database migration
You have to update/migrate your database though, because the database schema changed. For that you can use the SQL commands in https://github.com/rsnitsch/trackmania-records/blob/develop/server/migration.sql. Make a backup first!