Is it possible to change the title bar of your installer using Inno Setup?
By default is:
AppName=My Program
and when you run the setup
In the InnoSetup installation folder there's a default.isl file, open that file in a text editor, find the SetupWindowTitle entry and change the right side from Setup - %1 to only %1. Also repeat the process for additional languages you use in the setup, you'll find the matching '.isl' files in the 'Languages' folder.