the licence key is the software ,,its proof of a valid purches ,,just a thought if the software is still on a computer and dependent of the version it is ,,in the about tab of the software the licence key was stored in this tab once activated ,,,,just a shot since you lost/misplaced the licence key ,,with out regerstering it on the fourm,,,in your user control panel/profile/serial #,, if you get this resolved please dont forget to regerster it in the fourm