I can provide direct documentation links or specific file conversion steps based on your setup.
Download the .zip or .exe installer file.
The community-indexed Dahua Wiki Disk Manager Directory hosts verified archival releases, including standard stable builds:
Note: If you manage to find a verified standalone zip file of the updated Disk Manager from your regional Dahua distributor, simply extract the folder to your C:\Program Files directory and run the DiskManager.exe file as an administrator. How to Use Disk Manager on Windows 7 Safely
The partition layout, timeline, and file list will populate, allowing you to filter clips by date, time, and camera channel. System Requirements for Windows 7
Download video files directly to your local PC storage in standard formats like AVI, MP4, or DAV.
: To get Disk Manager, you must download the broader Dahua Toolbox .