Revert "Update and rename clsDatabase to clsDatabase.cs"

This reverts commit a8e5fbd77ff8543ebf82a3c3ca3ad65104152d0a.
Revert "Revert "Update and rename clsDatabase to clsDatabase.cs""

This reverts commit 0e89cd743b29004e38eda308f0d749d2414e996f.