Follow the steps below:
1) Select your Project in FlexBuilder and ---then go to Project >> Export Release Build in FlexBuilder IDE You will see a window getting opened as shown below
2) In the window leave all the options same and click next you will see the below window.
3) In the window now click Create..button . You will get the below window. Fill the information in the TextBoxes given(Any dummy info).
Give any name for the Save as option and save the certificate in some location by clicking the browse button and then click OK and then click Finish.
That's it you are done...You can now see the installer being created in your application project folder as yourappname.air
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