I have tried both english and french. Neither worked.

I have tried the link I initially received from the customer service, on the PC I got at work.........and it worked properly.
I have downloaded Limewire Pro for Windows !

So, apparently, it is not a scam but really from the Limewire official website I purchased the software.

But the problem is that I did not buy it to use it at work, but at home. Hence, I need the OSX version ......

I have sent a message to the technical support.

Patience is my second name.......