That's weird. Unlike many other CPS packages, there is no clone button (as N1GTL already noted) so you just use the write button. I've literally cloned hundreds of Waris radios in the past year and I've only had communication errors, model number mismatches or low battery alerts but never a serial number problem. You've got the right software though. I can poke around it sometime and look in the help files.
How many radios can one man own? Don't ask stupid questions.