Hi !
I've tried but no success... The strange think is that before to chose the "expert settings", there is something that I can set or not which is "scan web communications (HTTP)". "expert settings" seems to be a sub-level of this main option. But no matter if I choose or not the main option "scan web communication", the only way of solving the problem at the moment is to stop the service ...
It seems as if the fact of getting into jdownloader is the blocking thing, since downloading the link through mozilla is OK ...