Download path:
SAP Software Download Center -> Support Packages and Patches -> N -> SAP NetWeaver -> (Your SAP Portal Version/Release) -> Entry by Component -> Frontend
I downloaded 4.4 and 4.5. I installed 4.5.
Check if WebDAV is enabled. System Administration -> System Configuration -> Knowledge Management -> Content Management -> Protocols -> WebDAV
The Enable WebDAV Server should be checked on.
Configuration url
http://
Done.