Hi,
I just upgraded to Flash Builder 4 (beta 2) from Flex Builder 3 which I have been using since it came out. Problem: All the projects that were in my workspace from Flex Builder 3 did not carry over into Flash Builder 4 (e.g. in the "Flex Navigator" view if FB3). Flash Builder 4 now uses the .FXP format to manage projects, but Flex Builder 3 did not. Is there an easy way to get all my projects back into Flash Builder 4?
Use File->Import->Other In the dialog, select General->Existing Projects into Workspace Point the root directory to your workspace, check all the projects you want to import and that's it. Worked just fine for me.
Sharvey's answer was correct, but I also wanted to correct something from the original question, the part about .fxp files. Flash Builder 4 has not changed the format in which it stores projects; it still stores them as a directory with a .project file, a .actionScriptProperties file, and so on, just as Flex Builder 3 did. Where .fxp files come in is, they provide an easy way to package up a project into a single file and share it -- not only with other Flash Builder users, but also with users of Catalyst.
Catalyst is different from Flash Builder: .fxp files are its "native" format. So, suppose a designer created a project in Catalyst; you, the developer, could then import that .fxp file into Flash Builder using the "import FXP" command. When you do that, it unpacks the fxp into a traditional project format on disk.
Hope this helps clarify things! - Mike Morearty, Flash Builder team