I’ve just updated to version 18.104.22.168 (Windows version) and it has over-written my personal dictionary. This is annoying. However, I also run Scrivener on my tablet, so if I know where to look, I can recover the dictionary from there & copy it over to my PC. I just can’t see where it’s been stored. For the avoidance of doubt, this is NOT the dictionary at hunspell - it’s the one where I have stored my own words.