Work item accidentally deleted - ist there a way to restore it?

I’m afraid I deleted a really important work item accidentally which was full of important notes. Is there any chance to restore it?

Unfortunately I cannot find a backup, although backup is activated every 3:00:00 in the %appdata%/Grindstone 4/Backups folder, but I do not find this folder at all. It should keep up to 240 backups per database, but none can be found.
I am not at all sure I really deleted the work item :thinking:

Thanks for help.

Did you try using Rewind?