From Xojo Documentation

Read-Only Property (As String )
StringValue = aApplication.Copyright

New in 2018r1

Supported for all project types and targets.

A longer text description for the app. Usually this contains the app name, copyright, version and other information. This is displayed by some operating systems in Get Info or Property windows for the app. This property can be set only in the IDE.

Sample Code

Display the copyright info: