Just have your certified installer email tech support with the license serial # and the old activation key and they will be able to activate it again for you...
However if you did not have a dealer do the install for you, then you might be able to call Panasonic 888-275-2595.
Otherwise, the licenses are not too expensive and you might have to bite that proverbial bullet and buy another license, just like we sometimes do for the other software. Thanx Bill Gates!?$#%$@%$!@%##)+#
Don't forget to ask for a copy of the new license key and keep it, because it's good for a long time!