very sorry to bother you again, but the three .dll files (alut, OpenAL3 and python27) are still missing. This is announced as 3 couatl.exe errors when launching P3D v3.4
I can only repeat and confirm this can only be caused by the Live Update being prevented to download something, which can only be cause by external causes, like an antivirus or a firewall preventing the download.
The missing .DLL files are surely on the server, and the Live Update surely downloads them. As I've said, I already tested it by removing the missing .DLL and launching the Live Update and, sure enough, the missing .DLL were restored, as they should.
You can try installing the latest version of the Stand-Alone Addon Manager. That one is always kept updated with all the most important files so, until you figure it out the external cause which is preventing the Live Update to download, you can install that one, which surely contains the missing .DLLs too.