Like I said, they are interchangeable, but I guess I left out a little info:
Anything that is labeled as Macromedia Flash is an older version of Flash, created when Macromedia, the original producer of the software still existed. This applies up through Flash version 8.
Macromedia products were bought out / taken over by Adobe after version 8. Anything that does not include the name Macromedia, such as Flash CS3 and CS4, was produced by Adobe.