If you purchased Parallels Version 5 after 2010-Aug-15 and
prior 2010-Nov-30 (US, Canada, Australia and EMEA), then you can get a free upgrade
to Parallels Version 6:

http://www.parallels.com/de/keyfor6 (German)

You need your P5 key and a PDF scan of the invoice, showing explicitely a purchasing
date as above.

To activate P6 you will need *BOTH* keys, the new P6 key, *AND* the P5 key.

Regards, Rudi.