Moved to InDesign General Discussions.
You can download an older version (CS6 out to run on Vista) fro one of the links at the bottom of this page: Download and Installation Help
This will only work if the files were saved in CS6 or earlier ( and if earlier, it would be best to continue editing in the earlier version).
Can I download as a free trial?
Yes. If you don't have a serial number, they will install as trials.