Lost alle Snapshots

Hi there, Happy New Year!
I have a client that wanted his site removed, so I did. When I wanted to remove his Snapshot, I discovered that all my Snapshots are gone!!
I checked Dropbox, where they are stored, and see that there is no Snapshot added after december 8th.

Perhaps there was an update that day or week?

Nevertheless you can imagine that I'm not a very happy man at this moment, although my happiness is not solely dependent on Snapshot, but you catch my drift...

Is there a way to recover the settings?