Has anyone upgraded their Aquastream XT Standard pump to an XT Ultra pump? Can the unlock code only be purchased from Aquastream? Is there any informaiton on the upgrade cost anywhere?

Found the answer on pump upgrades online in the pump manual.

A version upgrade is available to be bought through our web shop. For
example, for upgrading from the Standard version to the Ultra version, write
down the serial number and the public key found on the tab "pump
information and key management" in the aquasuite software. When ordering
the desired upgrade from the Aqua Computer online shop, enter the serial
number and the public key into the remark field. As standard procedure, you
will receive the appropriate activation key by email. After entering the
activation key into the appropriate field of the software, you will gain access
to all features of the version.