# Bundle Upgrade, Downgrade, and Uninstall
An application bundle that has been installed in the Entando App Builder can be upgraded to a new version, reverted to a previous version or uninstalled at any time. You can update the bundle or just a component within that bundle, all within the App Builder.
# Upgrade or Downgrade Bundle Version
- Log in to your App Builder instance and select
Hub
from the navigation on the left to enter your Local Hub. - Click the
Installed
button to open a pop-up window with the options to update or uninstall the bundle. - Click the
Update
button to see a list of versions available. Choose a version. A warning will appear regarding the possible loss of features or data with the update. You may wish to review the bundle's release notes before confirming the upgrade or rollback. - Once you confirm, a page listing all the components in the bundle appears. You can
Update All
or select each component to be updated or skipped. - Click
Ok
to finish.
# Uninstall a Bundle
- Log in to your App Builder instance and select
Hub
from the navigation on the left to enter your Local Hub. - Click the
Installed
button to open a pop-up window with the options to update or uninstall the bundle. - Click the
Uninstall
button. - An initial check is made to verify that components are not in use outside of the bundle. A pop-up window will list the components with external references that must be removed manually and then the uninstall process may be resumed^.
- When the
Uninstall
is confirmed, a progress bar shows the following removal process:- Bundle resources are deleted from the Entando App Engine
- Components included in the bundle are removed from the Entando App Engine
- Plugins are unlinked
- To remove the bundle from the Local Hub catalog, click the
Undeploy
button.
^ When unistalling a PBC or any component with multiple bundles, it is important to remove the bundles in the reverse order of installation because of dependencies.
# Troubleshooting
If an error occurs during the uninstall process, check out the Troubleshooting guide or the Entando Forum (opens new window).