Well that's great news and thanks for sharing back how you solved it.
Searching for changed files of the day is a bit of an admin trick that may undo the damage, at least partially, to the last auto-save point, depending on save preferences.
(used to be more with mixed results, often that all you got was nothing, or plain text among formatting garbage)
Side note. This goes back a few decades, with the start of the typewriter - computer transition, before we had auto-save, but it still applies, because you still can't 100% trust the software will have your back, or will cover the last 5-10 min which may have had some important revisions. Anyway. After I was called upon a few times to (try to) recover lost end user files due to crashes, log outs, power outages, etc; I made it a point when I started instructing computer use and new software, to always tell people to hit save whenever they paused to review something else, look something up, gather their thoughts, answer the phone, before they hit print (print BSOD anyone?!), left their desk for anything, went to get coffee, walked out for a smoke, left for lunch, etc. Hit Save. Lock in your changes, people. Don't wait a half hour, hour, whole day. Give the document a name a few minutes after you start and then save frequently if you care about not losing data. Don't trust the computer. If you stop typing for a while, then HIT SAVE. To this day it is still something I practice myself and sometimes need to tell other users when I see several page long "untitled-nn" documents. And it is a bit of similar thing with versioning and then backups. System/hdd/flash drive gets dropped off in a panic ... "my files ..." When is the last time you made an extra copy or did a backup? ... crickets ...
Anyway. Great to hear you recovered the data. Practice saving
