The plugin tells you when a new release exists: a banner at the top of every page and under Settings → Updates, and optionally an email. It never updates itself.
cPanel & WHM and DirectAdmin: run the same command you installed with. Settings, templates, protected accounts and history are kept.
curl -fsSL https://iam4hosts.com/get | bashPlesk: download the new zip from iam4hosts.com/download/plesk.zip and upload it through Extensions → My Extensions → Upload Extension. It upgrades in place.
