Download warning is unclear
Users do not understand what the download warning message means. The help desk often gets requests asking for clarification of this message. The message is
An external application is needed to handle: %s NOTE: External applications are NOT Tor safe by default and can unmask you! If this file is untrusted, you should either save it to view while offline or in a VM, or consider using a transparent Tor proxy like Tails LiveCD or torsocks.
I propose the message be replaced with a shorter, more direct message in simpler language.
To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information