You need to contact your VAR and they will take care of it, or there are SolidWorks employees that post on the forum, send them a message if the VAR won't help you, they would be able to get you to the right person.
There are a number of threads in the forum about this if you use the search:
In summary, you need to change it in your SOLIDWORKS Customer Portal account at www.solidworks.com.
I hope this helps,
Thanks a lot.