A Zotero 7 dev build for Windows is now available:
https://www.zotero.org/download/client/dl?channel=dev&platform=win64-zip
We're still working on the Windows build process, so only the Win64 ZIP
is available for now — no Win32 build or Win64 installer, and a source
build won't yet work. Auto-updates from this ZIP to later dev builds
should work, though.
(This will also be the first Win64 version of Zotero.)