The 2011 upgrade is definately worth having as it has some wonderful styles.

Here is the contact name of the German Distributor:
MUSIXX GMBH
MAIERHOF 2
94167 TETTENWEIS
Phone: +49 8532 92590
Fax: +49 8532 925920
e-mail: info@ketron-musixx.de

If your outside Germany and have purchased from Thomman...Then you may be a bit stuck as most distributors will only supply support and upgrades to their own customers.