As some of you already know, Steinberg is moving away from e-licensers and hardware USB keys...and migrating most of their software to new licensing platform.
Unfortunately Halion 6 / Sonic 3 didn't make it. Meaning, you can only use it until your e-licenser software works on your particular PC (you will not be able to re-install e-licenser on new machine) or transfer your license to their USB key on new machine after May. From my understanding, they will no longer provide support for the e-licenser based products.

So, if you are like me, and used Halion 6/Sonic 3 on dozens of songs, you might want to take some actions while you still can, if of course you want to come back to those tunes at some point. I have Halion 6 both in DAW and BIAB projects...

The easiest way to preserve license is to get USB key and transfer license there... Unfortunately Steinberg stopped selling these (how nice!). So secondary market (ebay, reverb, etc.) is your best bet.

And another thing... New Halion 7 (which is on their new licenser) has certain VST3 protocols that some software including BIAB have issues with: General MIDI / program changes. I sincerely hope PGM will figure this out ASAP.
So as of now, Halion6/Sonic 3 is the last version that does Program Changes in BIAB.

https://www.steinberg.net/licensing/elicenser-end-of-service/