I don't know an answer to the question, but here is what I do.
Take photos of it (the screen) with a digital camera, along with photos of all of the setups, and any special tooling for each job (fixtures and cutting tools if special). If the customer supplies prints or drawings, even if on a napkin, I take pics of them also. Each different setup and operation is documented. The more photos the better. This also date stamps the information which can be helpful.
All of the photos and CAD/CAM are kept in folders (in a laptop) under each customers name and split into folders by part number.
So there is a folder "Valley Pump Shop", and in it is a folder "30253 Sprocket" (that is the part number) and in that folder is all of the files/photo's for the 30253 sprocket job.