Illustrator 24.2.3, cannot open a file for editing that worked fine in earlier version of Illustrator, probably CC 2019, to make a change. A preview is displayed before opening. Fortunately CS5 can open it, otherwise I would have lost a customer. After closing 24.2.3, it crashes about 50% of the time on any file I have modified. The CS5 versions of files being posted were produced by using CS5 to open the CC 2019 versions, although it complained that they were newer and might not have valid text attributes, and saving to CS5 format. The eps and TIF are used by the tray card. The 2up has the tray card positioned for printing on a special stock. This is a bug, not a feature! All files being worked on are local to my Windows 10, Version 1909 PC running Illustrator.

The files can be found for the next 3 months at: https://spaces.hightail.com/receive/oLWByJdt8v