Restoring OS6 default shares? Restarting Config Wizard?

Like dtarin in this post (https://community.netgear.com/t5/Using-your-ReadyNAS/How-to-restore-default-shares/m-p/1140916), I lost my default shares when I destroyed my initial XRAID volume so I could re-create it as a Flex-RAID volume.  Running OS 6.9.3.

 

Is there really no way to get them back?  Is there a way to restart the Offline Config Wizard?  (Would that force the ReadyNAS to recreate the defalut shares?)  

 

Having spent quite a bit of trial-and-error time trying to get permissions and other settings correct in custom shares, I'd like to avoid the same exercise when re-creating the default shares.