You can run this command to find the password. it worked for me anyhow.
Run
/sbin/gen_encstr
on the NAS and the whole string that appears is the decompression password.
there will be another tar.gz inside of the file (no pwd) then extract the \etc\config\smb.conf
and use that. (check the file for all your shares are listed) I think you should be able to reload the smb.conf using:
/etc/init.d/smb.sh restart