Also, are you sure you need this?

Normally, all you need is to click menu "Tools" -> "Publish to Racks and Tags" and it will upload any missing albums.

In extreme cases you can use "Force full synchronization" option in "View" -> "Preferences", "Racks and Tags" tab. This will make sure each and every album is present on the website.

Deleting and re-uploading entire collection seems to be a bit of time and bandwidth waster.

Andrei