I'm having similar issues with 1.5.2. If you start AL as a standalone and close it, does it crash as well? If it does, then the problem is definitely with AL and should be fixed because it doesn't work as advertised. I've got AL crashing on one computer (live rig) and running fine on the other. The difference is that the computer that crashes has only 4 megs of ram. The one that's working fine has got 12 megs.
Anyway the current solution for my problem with AL is that I don't use it any more. It has got some brilliant sounds that I'd love to be able to use but as it simply isn't stable enough it's not really an option for me. I think that I'm not the only one experiencing these problems and I'd really appreciate if Arturia would come up with an update that would magically fix everything. Cheers!