Succeeded Download
Hi again…
At last; I had some luck to download the whole Unreal Engine 4 Documentation which is here https://docs.unrealengine.com/latest/INT/
Using the** WebZIP 7.1** trial version… which I had found here http://downloads.fyxm.net/WebZIP-37921.html
The size was about 1.3GB… and took about 3 hours…
Now I can browse it offline 
Best Regards