Click on Snapshots
Select the snapshot taken when the file existed. Then go to Actions, and select Attach as Disk.
Click OK on the following message.
Wait for your computer to add the snapshot as an additional disk.
Once your new disk is attached, go back to your dashboard, click Actions and then Web connect.
Open File explorer and go to This PC. You will see a new drive ((E:) shown in this example) is added as a disk to your computer.
Once you open the drive, you can simply drag and drop the files you need or copy them with CTRL+C.
Do not forget to delete the disk you attached to your computer. You need to do this before your monthly billing to avoid being charged. Go to your dashboard, then select Storage, and under the Snapshots Attached as Disks Section, click on Actions then Delete Disk.