Hi all, I got reply from Arnold (the person who made KRec). He answered me after 10 minutes.
Here is the answer I got from him:
>
>Hi,
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>You can open the krec-files in ark (or any other archive-program) and extract >the raw-files, then you can convert them to wav with sox or to ogg/lame...
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> Have fun,
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> Arnold
>