Setup environment to edit and run an ActionScript project

I have a project from 2015 that uses ActionScript with Flex Builder (see xml below). It was built using Eclipse and I need somebody to show me how to setup my environment to allow me to edit and run the project. Files will be shared with the successful bidder. Once setup, I may have further work on making changes to the project which I will expand on with the winning bidder. This will be a separate project. <?xml version="1.0" encoding="UTF-8"?> <projectDescription> <name>Flash Trial</name> <comment></comment> <projects> </projects> <buildSpec> <buildCommand> <name>[login to view URL]</name> <arguments> </arguments> </buildCommand> </buildSpec> <natures> <nature>[login to view URL]</nature> </natures> </projectDescription>