Convert who.dat from version 0.003 beta4 or beta5 or
        version 0.004 beta1, beta2 or beta3 to WhO version 0.01 beta :

Place convert.exe in the same directory where the file who.dat is
placed. Then backup the file who.dat, only for secure.

After that run convert.exe, if there is no error-message, everything went ok.

If there is any error, please send me an email, i'll try to help you.

After converting to the new mask, you can delete the files 'convert.*' 
and 'caution.now'.

That's it. Happy working ;)