GLIOMA  The support forum for this developer is full of messages asking for help with problems. They never receive a response. I have posted two messages for support and never received a response, even though I have posted follow ups to bump the messages to the top. Like the other commenters have said, this program should be avoided.  
(Version 3.2)

PATRIZIAF  I tried it only because of the d.... SWF files. But it doesn't CONVERT them, it just makes screen recording of them! (I have other programs to do that).  
(Version 3.1)

EXORZIST  - if you don't want spend money for a task like this, why not use "Perian" with "MPEG Streamclip" to convert between these formats. This also works with wmvfiles, if "Flip4Mac" from Microsoft is installed.

- if you want to spend money and if you really need to convert flash-files to another format: buy "QuickTime Pro", install the (free) "Perian" and convert/export your flash-files with "QuickTime Pro". I tested it this week and it works (latest software). Costs are like 30$?

But... if you need a professional media-tool with presets you can choose from, "MediaCleaner" is/(was) the perfect solution. It's now "Autodesk Cleaner". It's very professional... and it costs also a professional price like 600$.  
(Version 3.1)

GLIOMA  You would be well advised NOT to buy this program. I have not been able to get it to work. All I see is a blue background and no movie preview nor conversion. Emails to the developer are ignored.   
(Version 2.5)

SMTIPS  O M G ONE HUNDRED DOLLARS.

I've used VisualHub quite a few times for converting flash flawlessly to several formats. Although it's not in development any more, it still works great.

Did I say...ONE HUNDRED DOLLARS?!?!  
(Version 2.3)

MONTY LEE  Program does not work effectively and there is no product support. Tried to convert a 356 kb swf file and the program spit out a 6gb (yes, gb) mov file. Tried it with two other files trying mp4 and other options but the outputs were all huge. I emailed support and over the past several weeks sent repeated request for help. No emails or support requests were ever answered. No support and terrible product execution. I do NOT recommend.  
(Version 2.2)

SPIDER22  I love Macvide FlashVideo Converter because it converts without any problem & very quickly!!!   
(Version 1.0d)

DP-G4-450GUY  iSquint

plus, it is free  
(Version 1.0d)