Once you create or install a custom packaged application, you can deinstall it by either:
Clicking the Deinstall Supporting Objects on the Supporting Objects page
Clicking Delete this Application on the Application home page
When you deinstall an application, you have the option of removing the current application definition and running the deinstallation script defined in the Supporting Objects.
To deinstall a custom packaged application:
On the Workspace home page, click the Application Builder icon.
Select the application.
Click Supporting Objects.
The Supporting Objects page appears.
From the Tasks list, click Deinstall Supporting Objects.
Select a deinstallation option:
Remove Application Definition removes the current application definition.
Deinstall Database Objects runs the deinstallation script defined in the deployment attributes for this application.
Follow the on-screen instructions.