When you have finished filling out the settings, simply press "Run" to start the generation of code. This might take a little while if you are reverse engineering from a database.

When the generation have finished you should now have a complete skeleton Seam application in the output directory. In the output directory there is a readme.txt file describing the steps needed to deploy and run the example.

If you want to regenerate/update the skeleton code then simply run the code generation again by selecting the "Hibernate Code Generation" in the toolbar or "Run" menu. Enjoy.