Since installing 176b (or so it seems) I suddenly cannot preview as I always have, on Chrome. To my knowledge I have not changed any preview settings. I now get the message "Unable to start HTTP server on ..." and that I should start with admin privileges (which I have set on the shortcut that I use). It does work with localhost.
I did re-install 173 stable, and still have the issue, so I've gone back to 176b.
Thanks in advance.