Failure to load-lost access to database and all data

When my computer starts up in the morning - Grindstone usually loads. This morning I received this error
[System.Data.SqlServerCe.SqlCeException: The repair of the source database results in potential data loss. Full recovery is not possible.]
At Artemis.App.LoadDatabas(Windows owner, String initialPath, String& databasePath, String& databasePassword, String& workingDatabasePath, String& databaseConnectionString) in c: \Users\Daniel\Documents\Visual Studio\Projects\Artemis\Artemis\App.xaml.cs:line 2396

There is NO User Daniel in my C drive - and I get this error whenever I try to startup Grindstone - even directly -

Is there a way to recover the data without having to download a whole new version - I am afraid if I do that - it will overwrite the current file and I will have no chance of recover.
Thank you