My German is rusty but yes, that is what it means.

From Google Translate:
With
this upgrade, you can use the functionality of a poweradjust 2 of the
"standard" version to extend the higher version of "Ultra". With
the help of the acquired key, the full scope of this later version may
be used, restrictions against factory shipped as version "Ultra"
poweradjust 2 controllers do not exist.



In
addition to the manual controls of the standard variant, the
poweradjust 2 in the Ultra version to use an external temperature sensor
for controlling the power. The scheme itself is based largely on case to the fan control the aquastream and can be adapted to your own needs very fine.



Upgrade sequence for poweradjust 2 USB:



First Order this upgrade in our shop and arrange for the payment of the item (depending on payment method). In addition, we require the following information: The serial number of poweradjust 2 controller and the request key. The serial number and the request key can be found in the aquasuite in the "Information & Key Management". Please write both information in the comment box of the order.

Second We'll review your information and will make the poweradjust for your 2 valid key finding. (Depending on payment method) after full payment we will provide you the necessary key by mail or letter immediately come.

Third Please
enter the code received in the aquasuite "& key management
information" in the window in the box for the Ultra Key and your
controller will be activated immediately.



Important
Payment Information: If you order only the upgrade and any other
article, then please select the shipping method please pickup from you
so no shipping costs will be charged. The key can be obtained by e-mail.





Please
note that after sending the unlock key is not returned in accordance
with the Distance Selling Act and a refund is not possible!