Current version is v5.0.25 Redesign and new features look nice. There is a migration tool built into the current v4.5.X version. Once the v5 is packed for Cloudron you can ship your data over to the new instance.
Note: v5 is now in beta. To upgrade from v4 you need to install v5 as a separate app and then use the migration tool in the latest version of v4 on Settings > Account Management.