If your PreSonus product came with an older catalog, manual, or other documentation, it doesn't necessarily mean that the unit is old. While it does take time for a unit to make its way from the factory, to the distributor, and then to the shelves, most products purchased new should only be a few months old. If older documentation was included, it could be the result of a simple mistake at the factory.
Please note that all the latest manuals, drivers, and software can be downloaded from http://www.presonus.com/support/downloads.
For included Studio One software, simply log in with your username and password, then select "My Software" to view your licensed downloads.