I have same problem because i not understand how and where create 'launch configuration' =/. An other problem is: why in jar create whits export job is automatically insert an Exit? when i create a bat that contain 2 bat create with export job the first start and run but the second do not start.
Actually the "export to zip" is probably the solution you need. Supposing your job name is "foo". You will find in the foo.zip a folder named "foo". In this folder there should be two folder one named "lib" the other "foo". In this second "foo" folder is located a runnable jar and an associate .bat file. FYI, i'm using Talend 4.2.2 and like you, i don"t see the point of the "option File -> Export --> Java --> Runnable Jar File" Hope my information will help you.