That was the last official update pushed to the client, however there has been some newer Beta and other “Interim updates” since then which you can manually download and install via the release history page below link.
https://www.emclient.com/release-history
Note: Before updating, first make a manual backup via “Menu / Backup” incase you need to restore for any reason. Also close eM Client before updating. You can see when the backup is complete in Show Operations via clicking the drop-down on the right of Refresh top left.
See @Michal_Burger post in the following thread as to why the latest interim release versions are not automatically pushed to all users