The LPT dongle will only work with an eLicenser Software up to x.xx (go to the eLicenser site, there should be an explanation and the exact version there, I think it’s under legacy software).
The real Problem ist: if you use the old version that still works with the LPT dongle, the Arturia software will probably not work because it needs a newer version for ist soft eLicenser.
a) Buy an USB eLicenser Key
b) Install the eLicenser legacy software. The last one that still works with the LTP dongle will already recognize the USB dongle, so:
c) Transfer the Cubase license from the LPT dongle to the new USB eLicenser
d) Install the latest eLicenser software
e) Cubase AND the Arturia software should work now.
(Better do the license transfer on a different PC to avoid that your Arturia license gets killed in the process. If you need to do it on your PC, try to find out how to preserve the Arturia license BEFORE you install the old eLicenser software. If it is possible to transfer the Arturia license from the soft eLicenser to the USB eLicenser, do that first. The license will then stay on the USB dongle, no matter what eLicenser version is installed on the PC.)
I hope there is no mistake in my list. Just read about the LTP to USB Transfer BEFORE you start the process. It worked without problems here. My old LPT key is now a nice souvenir on the bookshelf.