I am having the same problem. Config is gone, but Snapshot Pool is mounted ok and working. If i remember correctly i tried to create a user in order to disable the login. But i only got "wrong password" with the "change password" dialog and i gave up (how do i create an initial user?). Sometimes after that (next reboot? Didn't notice it at first because everything was working) my config was not visible anymore. Might be a coincidence...
I also searched for the FlexRAID-Config.db file. One "FlexRAID-Config.db" and one "FlexRAID-Config.db.bak" are located under "C:" and one copy of "FlexRAID-Config.db" is located under "C:\Windows\SysWOW64\config\systemprofile". But the later one is smaller in size (40kb to 200KB) and the change date is from a few minutes ago. The file under "C:" was last changed on December 21st instead.
Oh, i also changed the license from raid only to raid+pooling (Trial -> raid only -> raid+pooling), because at first i didn't realise that i would need the pooling feature for cruise control. Raid+Pooling license was activated probably on the December 20. The DB file in "C:\Windows\SysWOW64\config\systemprofile" was created on the 22nd. Don't know if that has any significance.
Anybody able to help?

Cheers,
Junsas