Thanks very much for buying the upgrade.
Based on a look in PACE's system, I see that your v5 licence is still active. Does Francois' reply from this thread solve it?:
viewtopic.php?f=1&t=19186&p=145341#p145341
micdev wrote:Once both licenses in ilok Manager, deactivate Hauptewrk 5 (if it was activated when you redeemed it) by right-clicking on it , select DEACTIVATE, then right-click Hauptwerk 6 license, click ACTIVATE (and follow the instructions).
(Either way, it would probably be advisable to drink anyway, given the day of the year.)