To retain your local Apps when moving to the new local Rack, you should export them all first. This will create a local archive of all pertinent data for each app you export.
Uninstall your old local rack: convox rack uninstall local. This should be performed with your existing CLI before upgrading that.
Deprecate your existing CLI version: sudo mv /usr/local/bin/convox /usr/local/bin/convox-old
To retain your Apps when moving to your new Kubernetes-based Rack, you should export them all first. This will create a local archive of all pertinent data for each app you export.
Deprecate your existing CLI version: sudo mv /usr/local/bin/convox /usr/local/bin/convox-old
Create and then Import your Apps from your previous exports.
Once satisfied that your Apps are running successfully on your new Rack, you can redirect any DNS / custom Domains to your new apps.
Then delete and remove your previous Apps and Rack. This should be performed with the older version of the CLI. convox-old apps delete <appname> and convox-old rack uninstall -r <rackname> etc.