on a pc you can check installed programs or right click over a swf, rollover open with and you may see your flash player version.
those links only work for browser plug-ins, not the stand-alone flash player that's installed on a computer.
I know this question was many years ago, but I had the same question and have today found how to do this in Windows:
- Click Windows Icon in the task bar
- In the 'Search programs and files' type FLASH (Flash Player will be in the returned results)
- Right Click Flash Player and select 'Open'
- Select 'Updates' tab
ActiveX and plug in versions are displayed.
Hope this helps