I had a problem when upgrading my system software to Mac OS 10.4.9

Long story short, everything erased on my hard drive, including lots of downloaded tunes from LW with no backup. Is there a way to at least get a list of my previous library or a list of files downloaded from my previous account at LW? I did not have Pro if that makes a difference. Had a basic LW account for 5 years.

I would like to at least start to recover some of it back if I can get a list of previous downloads.

Thanks.