Clicking on the Delete button in the ‘Upload File from PC’ section does not appear to work.
I wanted to upload a new version of a file to a package. I clicked on Delete, then browsed for the new version of the file (same name). When I update the package I discovered the file name now had a series of digits appended to it. When I looked in wp-contents/uploads/download-manager-files I can see both the original file and the one with the appended digits.