Import old Soundbooth files into Audition

I just started to use Audition, since Soundbooth is discontinued, I have old multitrack ASND files and want to import them into Audition.  It wont let me, my old computer still has Soundbooth on it, I am wondering if there is an uncompressed multitrack file other then ASND that would allow me to do that?  Any help will be great.