You can now access the history of uploaded files in a section MX > Fleet Documents by clicking on the History link.
A pop-up window will open with the historical details of uploaded files containing the following information:
Clicking on the file name within the status (e.g.) will open this file. This includes deleted files as they're stored on Leon servers.
If you enabled the opening of attachments in a separate tab of your browser, please make sure that you enabled pop-up windows.