No backup after synchronisations - how to restore old version?

[abdo]

I’m afraid you’re out of luck if there are no recent backups

It seems Anki is supposed to take a backup when you click the download button, but this is not the case with recent versions. Hopefully it will be fixed soon.

Deck vanished, forum combing unsuccessful, backups also empty

I’m afraid if you’re unable to locate the data in any backups, it has probably been lost. I just tried to reproduce this and found that Anki is not taking a backup when choosing “download”, which it used to do, so this functionality likely got accidentally lost when some code was moved about - I’ll look into it.