backups disappeared

Hey there,

We use the Plugin on very many Websites and since a pretty long time.

Every Monday I scheduled all my sites to backup to FTP automatically, this worked perfectly so far. In the beginning of a month I also update all my sites and check if my backups are there if there is any complication. I did this in January aswell and everything was fine. Yesterday I had a problem on a customer´s page and today after some trial and error I decided its easier to just back things up.

I then was pretty shocked when i went to my backup folder and there was no other backup then the one from yesterday (16.01) I later checked all other folders for other customers and ALL backups accept the latest one are gone! I checked different sites and the configured jobs there and all of them are supposed to save 10-15 backups, which, as mentioned before, was working before.
(I checked the backups on the 5.1. the last time, and every customer had his 10-15 backups there)

Please help me, is there any way I can restore this stuff? I could be very screwed if not.

Greetings
Marcel