# Bundle Upgrade, Downgrade, and Uninstall
An application bundle that has been installed in the Entando App Builder can be removed, upgraded to a new version, or downgraded to a previous version at any time. You can update the bundle group or just a component within that bundle.
# Upgrade or Downgrade Bundle Version
- Log in to your App Builder instance and select
Hub
from the left navigation bar to go to 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 the list of available versions. Choose one and 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 left navigation menu to enter your Local Hub. - Click the
Installed
button to open a pop-up window with the available options. - Click
Uninstall
. - An initial check is done 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 cleared manually, and then the uninstall process may resume.
- 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
- Microservices are unlinked
- To remove the bundle from the Local Hub catalog, click the
Undeploy
button.
Uninstall Order
When unistalling a PBC or a Bundle Group with multiple bundles, it is important to remove the bundles in the reverse order of installation due to dependencies.
# Troubleshooting
If an error occurs during the uninstall process, check out the Troubleshooting guide or the Entando Forum (opens new window).