I created a community account and was provided the link to download Seafile Pro, but I’m not seeing the Windows versions. Where might they be?
A Professional Version on Windows is impossible, not even all requirements of Pro are ported well to Windows. And no Pro Customer would ever have the idea to use Windows. You could try it with docker, but their own images are bad and there container registry for Pro even worse. You should use Linux, Windows isn’t supported anymore, even on Community Edition. A good Guide for Seafile is the community manual.