If you read the End User License Agreement, technically, Cake forbids the selling & transfer of their software.
However, the whole point of the free 'LE' versions included with hardware products are to exemplify the software in the hopes & anticipation that you'll pay for the upgrade, as I and others have done.
Now your not going to sell it, but rather give it away, and it hasn't been registered, so you wouldn't be transferring it either.
In essence, since you already own Sonar, you'd actually be doing Cake a favor by giving some one else the chance to check out & possibly upgrade as well, which is what Cake would want to happen.
Sorry for the strike throughs - not my doing - just happened for the first time.
Tried do fix it, but no way how.
Now I wouldn't go on what I or anyone else says, but to cover your behind, [and mine], you should ask Cake.
On the other hand, how would they ever know, since you haven't registered and/or activated the serial number. They would have no idea which free 'LE' version came in what box & where & when.
If it were me, I would attempt to ask Cake first though.