I have tried all in my possibilities. The client attempts to connect to the EU server, but does not receive a reply. Similarly, 
https://www.elderscrollsonline.com/en-us/home remains stuck. The file 
http://launcher.bethesda.net/Bethesda.net_Launcher/Bethesda.net_Launcher.patchmanifest starts to download, but does not go beyond the headers (receives the size and stops).
The 4.5 MB beacon = intro image of the client is however received at the habitual speed. BTW I would suggest to make it a lot smaller ... it makes seem the computer much slower that it really is 

Due to the huge download, I really do not want to attempt a fresh install.
Everything worked well until yesterday evening +/- same time as this post. I have not made any software updates or changes on my system either.
I have checked the cables, connection, routers, up and download speed. I can ping all servers. netstat shows me nothing suspicious.
I'll go to sleep now. Tomorrow is another day. It must be just me 
