You should ask your VAR since they set it up. However, I think the information should be present in the old versions of the files.
We have set this up to view revision history information, and to display revision history in drawings, for many customers.
Only the latest (K) revision is actually live here, the others are copied upon a new revision. Next revision, K will be copied to the cell below, J to the cell below and so on, and F will "disappear" out of the table.
You need to access file History and Get version like Steve Ostrovsky is showing above. All revisions and versions will be available. (Unless some genius has set up a Cold Storage scheme which deletes old versions and didnt check the Keep Revisions checkbox)