We just released version 3.7 of our WatchFTP program.
This release will automatically repair its databases if they somehow become corrupt. Database corruption could occur if the task is suddenly stopped (at "just the right/wrong moment") by the operating system, for example by a forced reboot after installing updates.
This is a free upgrade for all customers. Download the latest evaluation version and install it "on top" of your current install (no need to uninstall first).