License problem

Okay, I suppose it’s very common that people have issues with activating Unity. But im very frustrated with this one and need your help.

My problem is that I do all the steps for manual activation (Save license request, activate license on hompage, recieve a new license file).

So then I restart Unity and try Read File but it wont let me open the downloaded file or any other file.
What am I doing WRONG!?

/Wakka

seriously, not even a developer can help me out?

can you post screen shots or video of what you are doing.