UPDATE: Although the extent of the vulnerability of pre 3.x versions of uT is not yet fully explored, in consideration with a number of our user requests, we will be allowing uT 2.2.1, 1.8.5 and 1.6.1, however we still recommend that you consider migrating your torrents to another client regardless (if you haven't already done so). If you intend to keep using uT, set net discoverability to false, but if you choose to still use it, you're doing it at your own risk.