I have the same problem, and by the time I need a new laptop, they won't be offering them to download anymore.
I've been emailing a lovely lady at MK.com and have found out that
the MP3 files ARE on the disc. I've confirmed this, by going to the default Sony menu and looking at the files under MUSIC - they are ALL there and I can play them on my TV !!
Unfortunately, I cannot seem to copy them onto a USB, Sony does not seem to have any options to transfer the files.
So, I think I will just ask a friend with a Bluray CPU - get them to copy the files onto a USB and then import them onto my computer.... hopefully !