[HELP] Missing VMs folders from datastore

Hi

I think I had power down when I was at work, and after rebooting ESXI 5.5 all my VMs were UNKNOWN (INACCESSIBLE). Tried to restore them to find out that all folders with VMs are gone from Datastore, with all virtual disks, config files, etc.

There are two folders instead:

.sdd.sf

and

vsantraces (which I think was created on the day of power loss)

Could somebody advise me how to get them back?