What is a fxp file and how do I open a fxp file?
An FXP, or Flex project file is created by Flash Catalyst and Flash Builder to store source code and assets, and user interface design components such as drawn objects, buttons, scroll bars, text boxes, and images. FXP files created in Flash Catalyst can be imported into Flash Builder.
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How to open fxp file on Wikipedia
How to open fxp file on Microsoft.com