To upload files to us, please use the SI Cloud Service found here - https://oc.sigames.com/owncloud/index.php/s/Kzvhd0MdU3v4Nv4
You can drag files directly into it or can 'Click to Select Files' to open up Windows Explorer and find the file on your system.
Please remember to mention the file name of the uploaded file in either your forum post or when in contact with a support agent.