If you did an Update from older Wavelab, you can’t use Steinberg Licensing at the moment!
It will transform in the next weeks.
That was you… activation codes are one time codes…
I highly doubt that…
If you used an Elements license to update to 11 pro then this is now your actual license. You can download and install Wavelab 10 Pro on every system you like, since you still need the USB eLicenser to use it and you will ever need to use it.
The new license system is only useable with new software versions.