@ Nevin
Two methods to upload:
- Using Windows Explorer, Connect to the link and drag the file into the Right pane and drop it, that starts the upload, you don't have read access to this folder.
Or
- Upload it using the Run command-line in Windows: Windows Key + R (to get the run box), copy and paste this explorer ftp://ftp.avast.com/incoming and drag the file into the window, from another explorer window.
But as mentioned, you could try the beta build if you accept the usual issue involved in beta testing on a live system, possibly not a good idea without a backup and recovery strategy.