After I did that I had to use overwrites for it work. I'm in year 2044 so the database is probably too late to not. Couldn't hurt to try again. Sorry it hasn't worked for your though!
Deleting both the app and picture folder, and then redownloading both (with the update) fixed it for me. Lose all of the faces which is less than ideal.. but at least have faces again.
I'll be backing up the config file before Preserving faces every year in the future!
Made an account just to post here and thank you all for this pack. Just installed this on my FM20 save - really reinvigorating my save and making it hard to go to FM21 (which I've already bought)!