Hi -- I use Thunderbird for my email client (portable edition, on a local drive) and it seems that Blink cannot create subsequent rules for the Thunderbird application. The first rule will create when prompted, however; when another rule prompt is shown (for example, Thunderbird using a different outbound port) and 'allow/create permanent rule' is chosen, the rule is not created within Blink.
However, if I manually edit the existing rule to match the port ranges desired then it works normally.
For information about the 'portable' edition of Thunderbird:
http://portableapps.com/apps/internet/thunderbird_portable
Please note, this is *not* being ran from a memory key but instead is being ran locally...