Here’s the link to the latest weekly build of darktable 4.5, darktable-4.5.0+328~g1aca07c62d-win64.exe - Google Drive. The list of latest changes is at Comparing a9c409d2af…1aca07c62d darktable-org/darktable · GitHub.
I updated the build environment this week, so please check things such as font rendering to see if any bugs have crept in.