I don't know why but with Live 9 i can't recover my work after crash.
i'm on a mac 10.6.8 - 32bits ...
but anyway it was all right in Live 8 on the same computer, there was always the possibility to get back the last state of my session before it crashed
I am having the exact same issue (& same OS) after the auto update to 9.0.2, I tried downloading the update from the site and reinstalling 9.0.2 and still same issue...
try downgrading your version to 9.0.1 instead of 9.0.2. It works well for me now.