Make sure you close Outlook before you start Recovery Toolbox for Outlook. Try to download the newer version of our software and install it.
In some cases, you have to reinstall Microsoft Outlook and Recovery Toolbox for Outlook because some components that are in use must be updated, but they cannot be released without reinstallation. Try to recover your data to separate files, it may help. Make sure you have enough free space on your storage drive to save recovered data. Do not try to save the file with results under the same name as that of the damaged file.
Try to recover data again.