We regularly release new versions with additional features, better performance and security enhancements. These new versions are rolled out through automated updates, but certain conditions could cause them to fail. Failure to update can result from environment configurations, such as permission issues, or due to interactions with other applications, such as antivirus or firewall policies.
We periodically retire old versions by disconnecting the application from computers that have failed to auto-update for a long time. As a last step before disconnecting, we notify you via email and through the Dropbox app that an update is needed.
If you receive either of the messages above, please make sure you follow the instructions in this article to keep using your Dropbox.