Sorry for the delay in getting back to you. Here is the response I received from our development team ...
We don't provide an option of downloading our files via DL manager due to both security and technical reasons. This might be possible in the future but not now.
In case of a single file download - if it breaks - Chrome (or I believe any other modern browser) is able to resume download. It works directly from Amazon S3, so it should work, unless it takes too much time and the download link gets expired. In case of multiple file download the story is the same, the only difference that Chorus not Amazon consolidates and provides files, but it should not behave differently.
If you can provide more information about the issues you are having we would be happy to look into it more. If you want to contact me directly off forum with the download link we can see if we can reproduce it ourselves.
Cheers,
Mike