I need to update acrobat standard 6.0.6 to 7.0.0
I've got Acrobat Standard 6.0.6 on an old work computer, so I tried to update it. I found updates on adobe's site all the way from 7.1 to 11.0. Is there any way I can get up to 7.0.0? Perhaps it requires an actual upgrade to go up to the next major version release? I spoke with customer support, but I could find a serial number b/c I have no original documentation and couldn't guess the email address it was registered to, so he wouldn't help me.
Am I just out of luck?