When you reach timeout when launching Windows applications, try one of the following ways:
Close all unneeded apps and opened folders. Open Katalon Studio only.
Remove unused shortcuts on your desktop and your taskbar.
Use Windows.startApplication(…) instead of Windows.startApplicationWithTitle(…).
For example:
Windows.startApplication('C:\\Users\\katalon\\Desktop\\Demo\\WindowsFormsApp.exe') Windows.switchToWindowTitle('Main App Title') // Replace this by your main window title