stealth firewall on some torrent sites

sorry if this has been covered elsewhere

my easy to use comodo software upgraded yesterday to v7…now I cannot download/upload using utorrent on some sites (on others that I don’t use it seems to work)- the so called “firewall wizard” in the help guide doesn’t seem to work and fiddling with windows firewall has made no difference either…so short of removing this altogether and reinstalling the older version- is there a way this can be fixed easily?