To make the installer launch your application after it has been installed you need to add an “Execute launcher” action to your “Finish screen”.
You will need to select which launcher for the installer to run.
I am just making an installer for Windows, Mac and Linux using install4j. However, it isn’t clear from the docs how to change the banner image on the left hand side.
To set it on the Welcome screen, you need to go to Installer -> Welcome and select the “Images For Banner” property,
To change it on the Finish screen, you need to go to installer -> Finish and select the “Image for Banner” property.