@sander
glad to hear that you finally got the shares back. Did you attempt the upgrade after that downgrade as well? Apparently, the transition from docker to docker-ce caused some issues, where the upstream development messed with quotas and hence resulting in unmounted volumes - I ran into this issue as well. Check out this thread:
Do you happen to have a screenshot of the error the Webui was throwing when you tried to add a share through the UI? Also, now that you have manually edited cfg.smb, are those shares now showing in the WebUI (I don’t know that they should, but I am curious).
I’ve been running Rockstor now for more than a year, and so far (knock on wood) no data loss …