Actually, Keylab essential 49 is recognized by Analog Lab 2. I have three OSs on the same computer, each on their own SSD drives (Faster starts) XP, Windows 7 and Windows 10. I had AL2 on windows 7 and AL3 on windows 10. I fought against AL3 because you needed to select whether you wanted SYNTH, PIANO, ORGAN or MULTI. I was under the impression that all the sounds in AL2 had to be selected using one of the four buttons. What I didn't realize was that all the sounds in AL2 were actually SYNTH sounds but that the newer instruments created in the V-collection (Grand Piano, Hammond) were not in AL2. Some of the multi instruments in AL2 were set aside in the MULTI selection but that's a limited number of Presets.
I originally didn't want to switch because I had gone through all presets in AL2 (over 6000) and sorted them into my own banks and assumed I would have to start over again thinking that a Piano sound in a synth had to be selected by clicking on the PIANO button first.
In any case, AL3 does sound better than AL2 so I would recommend switching to AL3 instead. There are a few things that are different and don't make things easy but you get used to them.