In some cases you might need to go through restoring a backup of your account. But sometimes you only need to restore a single sheet of data. A workaround for this is:
1. Download the backup containing the data from the time and state that you would like to restore to.
2. Register for a new empty Ragic account, and restore your downloaded backup to this new account.
3. You can now export the sheet that you would like to restore as an Excel or csv file from the new account. The downloaded spreadsheet should have the original values before the import.
4. Import the values from your downloaded spreadsheet file to your original account.