I just lost a bunch of work because Illustrator hadn't updated the DataRecovery folder location when it upgraded. When I went to preferences, the location was set to a non-existent folder which had been the default location for a version 23 but had been removed by the update to version 24. This is a huge oversight and needs to be corrected. To be clear, I had not set this location manually, although I have now set the location to the default folder for version 24 (which did exist, but no files). This location needs to update automatically with updates, even if manually set (since in my case it's set manually by technicality).