[chadfree] Need your help!

Hello Everyone,
  I'm a first time user. I have encountered a compatibilty problem with one of 
my software. I am using a program that has a file extension KOS. It is a 
keyboarding software. My operating system is windows XP.
  Lately when I used the software and save it to the hard drive  and try 
opening it, it will not open. 
  The prompt says " To open this file, windows need to know what file created 
it"
  I lost the CD rom so I cannot reinstall the software. Your help will be 
greatly appreciated.
   
  Renold

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