importing old cubase files in cubase 6

Hello

I was already using cubase on my atari computer.
In that time it was saved in *.all extensions.
I want to use some of the old files again, but cubase 6 doesn’t recognize the old extension.
Is there a way to convert the files so I can use them in cubase 6 again?
Thank you for your answer

http://www.steinberg.net/forum/viewtopic.php?f=20&t=230