Saving streaming .rm files

[Jixby Phillips]

I can't figure this out, and googling this is too confusing. I keep getting results that are programs you can download to do this, but when i get them downloaded and actually TRY to do it, i get a message saying THIS PROGRAM CAN NOT SAVE .RM FILES

Is there a good way to do this? Better yet be able to straight up convert them to mp3 or something? The only thing I can come up with on my own is to set a sound recording program to record what the computer hears and sit there for three hours while it records. HEEEEEEEEEELOP