https://sourceforge.net/apps/trac/sourceforge/ticket/26087
Tested on my fancypants test project.
With my (much older) "sillygoose" test account, I can add files via the web interface regardless of whether that's an admin or just developer. Whereas my "chompchompgoat" test account (created today), I can only add files if he's listed as an admin.
I tried adding "Developer" to "Configure" on the Downloads tool permissions, and that didn't make a difference.
[#2242] seems related?
Dupe of [#2242]