Closing, for the question has been answered numerous times since the topic was opened. Then it turned into a forum game where everybody would keep on saying the same thing again and again, so I had to tidy it up. I don't want to let it happen again, so closing the topic to save you guys from yourselves.
Conclusion: You can't export to Flash. Only HTML5 games can be created using GM at the moment. You need to buy the Web export module to compile the project to HTML5. Further information in this regard can be found on the Knowledge Base. Also, please feel free to create another topic if the articles can't answer any specific questions you have.