DB Migration Check for Users not on current DB

src/NzbDrone.Core/Datastore/DbFactory.cs

@@ -1,4 +1,4 @@
-using System;
+using System;
 using System.Data.SQLite;
 using Marr.Data;
 using Marr.Data.Reflection;
@@ -127,6 +127,11 @@ namespace NzbDrone.Core.Datastore
                     return dataMapper;
                 });
 
+            if (db.Migration > 100) //Quick DB Migration Check. This should get rid of users on old DB format
+            {
+                throw new CorruptDatabaseException("Invalid DB, Please Delete and Restart Lidarr");
+            }
+
             return db;
         }
     }