You can play with the plug-in without installing it using the sample application available online.
The sample application enables you to learn about the plug-in capabilities, Oracle APEX APEX integration, and simple examples of how to use the United Codes Modal Warn On Unsaved Changes Pro.
The plug-in sample application can be downloaded and installed in your APEX scheme for free using the Trial License.
The plug-in sample application is one way to install the plug-in. Learn more in the section Getting Started \ Installation.