Note: If the "7Zip" folder doesn't exist under Plugins, you may need to create it.

: Ensure you have the latest standalone version installed on your machine.

: Close and reopen the app; you should now be able to drag and drop .7z files directly to install them. Troubleshooting "Archive is Unknown or Damaged"

C:\Users\[Your Username]\AppData\Local\AcTools Content Manager\Plugins\7Zip .

: Select and copy all the files inside that folder.

: Go to the default installation path, usually: C:\Program Files\7-Zip .

: Right-click the 7-Zip File Manager and select Run as administrator to ensure it has the permissions needed to associate with unknown extensions.