DiskState can be used to detect the slightest change to files in folder structures. In other words, DiskState can capture the state of all files in a folder tree. It uses the powerful 128-bit MD5 technology key for each file. You can then later compare old states with the current one.
A window will prompt you with the changed, added and missing files.
The "State Captures" window can be opened by clicking the "Compare" button of the main window (or use the context menu by right clicking in the main window).