I cannot download IPPS 2019 Update 4, I get a 404 if I try to download either for Windows or macOS:
http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/15480/m_i...
http://registrationcenter-download.intel.com/akdlm/irc_nas/tec/15550/w_i...
The error in the browser is:
HTTP Error 404. The requested resource is not found.