How do I upgrade my customers to a new version?

Create a new version of your managed package and upload it in the released state. After you upload, you can share the Install URL with your existing customers so that they can upgrade. If you’re deploying only a bug fix to your customers and want to upgrade them automatically, see “Scheduling Push Upgrades” in the Salesforce online help. You can use the License Management App (LMA) to find out which customers need to upgrade.

Customers can also check whether an upgrade is available by logging in to the AppExchange and viewing the My Account page. If a new version of the app or component is available, it appears on this page.